Thread: Turbo C Structures and Writing to file help

Sadly the problem of suddenly exiting is still there... Also, the while(getchar()!='\n'); keeps getting me to press an extra enter after each input... For the s_students.id, it should read the file then add 1 before displaying yet when I do that the number jumps from 00001 to 03285 or something.

My current code is attached to one of my previous posts only changes from that is the fflush(stdin); changing to while(getchar()!='\n');

Yeah I see the indent problem now, but since I always opened it with Turbo C the indents look good with only one space. I can't do anything with the code during this post because I'm using a different computer and its just about midnight where I live... The basic problem is with the structure reading/writing and the sudden termination of the program.

Originally Posted by PHGDAL

My current code is attached to one of my previous posts only changes from that is the fflush(stdin); changing to while(getchar()!='\n');

Yeah I see the indent problem now, but since I always opened it with Turbo C the indents look good with only one space. I can't do anything with the code during this post because I'm using a different computer and its just about midnight where I live... The basic problem is with the structure reading/writing and the sudden termination of the program.

Using the while getchar() !='n') code is incorrect. That won't do what you want. Use gar=getchar(), where gar is a garbage variable that will not affect your zrogram in any way. That will zull off any single remaining newline, after a scanf() has left one in the keyboard buffer. You should never have multiple newlines that have to be removed from the keyboard buffer, in your program.

'm leaving now to get a new keyboard and for lunch. Zlease zost uz what you're doing to make the zrogram stoz running. I'll look at it, using Turbo C, when I get back.

Sorry for really late reply. Anyway, here's the code for the whole program so far, it's not complete.

Code:

//Global variables are marked as v_*
//Local variables are marked as lv_*
//Axes variables are named as x and y
//Functions are marked as f_*
//Files are marked as file_*
//File locations are marked as c_*
//Structures are marked as s_*
#include<conio.h>
#include<string.h>
#include<stdio.h>
#include<ctype.h>
#define v_length 17
void f_loginapproved(void);    //Function prototypes.
void f_logout(void);
void f_read_pass(void);
void f_change_password(void);
void f_write_pass(char[v_length]);
void f_login_border(void);
void f_main_border(void);
void f_main_options(void);
void f_student_options(void);
char f_encrypt_password(char[v_length]);
void f_add_student(void);
void f_search_student(void);
void f_remove_student(void);
void f_dialog_border(void);
char f_clear_variable(char[]);
char v_uname[v_length]="Admin001";  //Default username and password global variables.
char v_passw[v_length]="password";
char c_filename[20]="login.dat"; //Password file for login.
char c_student_rec[20]="stud.dat";
char c_staff_rec[20]="staff.dat";
char v_garbage[20];
FILE *file_password;
FILE *file_student_rec;
FILE *file_staff_rec;
struct sgrades
{
  int History;
  int Geography;
  int Math;
  int English;
  int Humanities;
  int Science;
  int Art;
  int PE;
};
struct student_rec
{
  int id;
  char fname[15];
  char lname[15];
  char address[50];
  int age;
  char gender;
  char phone[15];
  sgrades s_grades;
};
struct staff_rec
{
  char fname[15];
  char lname[15];
  char address[50];
  int age;
  int id;
  long int phone;
  char gender;
  double monthly_pay;
};


void main(void)    //Main function used as login screen.
{
 clrscr();
 f_read_pass();            //Moves to function to update password variable.
 char lv_name[v_length]="";         //Sets local input variables for login.
 char lv_pass[v_length]="";
 int lv_valid;             //Sets variable to count attempts in loop.
 int lv_attempt=0;
 do{
  f_login_border();        //Draws login border.
  gotoxy(32,25);
  printf("Username:");     //Displays username and password labels.
  gotoxy(32,27);
  printf("Password:");
  gotoxy(43,25);
  gets(lv_name);           //Gets input of username and password from user.
  gotoxy(43,27);
  gets(lv_pass);
  f_encrypt_password(lv_pass);
  if(strcmp(lv_name,v_uname)!=0 || strcmp(lv_pass,v_passw)!=0)    //Compares inputted password and username with file-saved password and default username.
   {
    lv_attempt++;
    lv_valid=0;
    gotoxy(27,30);
    printf("Incorrect username or password"); //Error message if wrong input.
    getch();
    clrscr();
   }
  else                   //If input is correct local variable valid is 1.
    lv_valid=1;
  }while(!lv_valid && lv_attempt<3);  //Loops until more than 3 tries or valid is 1.
  if(lv_attempt>2 && !lv_valid)
   {
    gotoxy(18,30);
    printf("Sorry, maximum of three(3) attempts reached");  //Error message after 3 wrong tries.
    getch();
   }
  else
   {
    f_loginapproved();   //Main menu function to display all options.
   }
}



void f_loginapproved(void) //LoginApproved function to enter menu after login.
{
 int lv_mainmenu=0;    //Sets variable for user input.
 int lv_choice=0;
 int lv_counter=1;
 do{
  clrscr();
  gotoxy(37,14);
  printf("Main Menu\n");
  for(lv_counter=1;lv_counter<=5;lv_counter++)
  {
   printf("\n\n\t\t%i.",lv_counter);
  }
  gotoxy(19,17);
  printf("Main Options");       //1.
  gotoxy(19,19);
  printf("Student Options");    //2.
  gotoxy(19,21);
  printf("Staff Options");      //3.
  gotoxy(19,23);
  printf("");			//4.
  gotoxy(19,25);
  printf("Exit");               //5.
  gotoxy(17,29);
  printf("Input:");
  f_main_border();      //Draws main border around main menu.
  gotoxy(23,29);
  scanf("%i",&lv_mainmenu);
  v_garbage=getchar();
  switch(lv_mainmenu)   //Checks user input with possible answers.
  {
   case 1:              //Main Options.
   {
    f_main_options();
    break;
   }
   case 2:              //Student Options.
   {
    f_student_options();
    break;
   }
   case 3:              //Not specified.
   {
    printf("Sorry, this option is currently unavailable");
    getch();
    lv_choice=0;
    break;
   }
   case 4:              //Not specified.
   {
    printf("Sorry, this option is currently unavailable");
    getch();
    lv_choice=0;
    break;
   }
   case 5:              //Logout.
   {
    f_logout();
    lv_choice=1;
    break;
   }
   default:             //If any other character is inputted.
   {
    f_dialog_border();
    gotoxy(19,25);
    printf("Invalid entry. Please use numeric values only.");
    getch();
    lv_choice=0;
    break;
   }
  }
 }while(lv_choice==0);   //End of while loop.
}




void f_read_pass(void)   //Read password function to read saved password file.
{
 if((file_password=fopen(c_filename,"rb+"))==NULL)    //Opens password file and checks if empty.
 {
  printf("No password, default=password");
  getch();
  f_encrypt_password(v_passw);    //Encrypts default password.
  clrscr();
 }
 else
  fscanf(file_password,"%s",v_passw); //Reads password and updates variable.
 fclose(file_password);
}




void f_change_password(void)  //Password function to edit password variables.
{
 char lv_pass[v_length]="";
 clrscr();
 f_main_border();
 gotoxy(34,14);
 printf("Change Password");
 gotoxy(15,16);
 printf("Use this option to change your login password. Make sure");
 gotoxy(17,17);
 printf("it is a password that you remember. Your password is");
 gotoxy(19,18);
 printf("encrypted and safely stored until next login.");
 gotoxy(15,23);
 printf("Enter current password: ");  //Current password test before edit.
 gets(lv_pass);
 f_encrypt_password(lv_pass);
 if(strcmp(lv_pass,v_passw)!=0)   //Asks for current password before prompting for new password.
 {
  f_dialog_border();
  printf("Wrong current password entered. The password has not been");
  gotoxy(14,26);
  printf("changed. Press any key to return to Main Options menu...");    //Error message, does not change password and returns to main menu.
  getch();
 }
 else
 {
  gotoxy(15,28);
  printf("Enter new password [17 characters max]: ");   //Request new password.
  f_clear_variable(lv_pass);   //Empties lv_pass array to be used.
  gets(lv_pass);
  v_garbage=getchar();
  f_write_pass(lv_pass);      //Sends lv_pass array to function as argument.
  f_dialog_border();
  gotoxy(29,25);
  printf("Password has been changed.");
  getch();
 }
}




void f_write_pass(char lv_npass[])     //Password writing function to edit password.
{
 f_encrypt_password(lv_npass);   //Sends lv_pass to be encrypted before continue.
 strncpy(v_passw,lv_npass,v_length);   //Updates global variable with new password.
 file_password=fopen(c_filename,"wb+"); //Erases old password file with blank.
 fprintf(file_password,"%s",v_passw);  //Saves new password in blank file.
 fclose(file_password);
}




void f_logout(void)        //Logout function to exit program at main menu.
{
 char lv_cancel;
 f_dialog_border();
 gotoxy(22,25);
 printf("Logging out. Press any key to exit program..."); //Displays logout message.
 getch();
}





void f_main_options(void)   //Main options funtion to personalise menu.
{
 int lv_options=0;
 int lv_choice=0;
 int lv_counter=1;
 do{
  clrscr();
  gotoxy(35,14);
  printf("Main Options\n");                 //Title of menu.
  for(lv_counter=1;lv_counter<=5;lv_counter++)    //Loop lays out numbers for menu.
  {
   printf("\n\n\t\t%i.",lv_counter);
  }
  gotoxy(19,17);
  printf("Change Password");      //1.
  gotoxy(19,25);
  printf("Return to Main Menu");  //5.
  gotoxy(17,29);
  printf("Input:");
  f_main_border();       //Draws main border around labels.
  gotoxy(23,29);
  scanf("%i",&lv_options);    //Gets user input.
  v_garbage=getchar();
  switch(lv_options)
  {
   case 1:                    //Change Password.
    {
     f_change_password();
     lv_choice=0;
     break;
    }
   case 2:                    //Not Specified.
    {
     f_dialog_border();
     printf("Sorry, this option is currently unavailable");
     getch();
     lv_choice=0;
     break;
    }
   case 3:                    //Not Specified.
    {
     f_dialog_border();
     printf("Sorry, this option is currently unavailable");
     getch();
     lv_choice=0;
     break;
    }
   case 4:                    //Not Specified.
    {
     f_dialog_border();
     printf("Sorry, this option is currently unavailable");
     getch();
     lv_choice=0;
     break;
    }
   case 5:                    //Return to Main Menu.
    {
     lv_choice=1;
     break;
    }
   default:                   //If any other characters are inputted.
    {
     f_dialog_border();
     gotoxy(19,25);
     printf("Invalid entry. Please use numeric values only.");
     getch();
     lv_choice=0;
     break;
    }
  }
 }while(!lv_choice);          //End of while loop.
}





void f_login_border(void)   //Login border function to draw border on login.
{
 int x=23;             //Sets variables X,Y as horizontal and vertical lines.
 int y=24;

 gotoxy(x,x);          //This is the top left corner.
 cprintf("%c",201);
 gotoxy(60,x);         //This is the top right corner.
 cprintf("%c",187);
 gotoxy(x,31);         //This is the bottom left corner.
 cprintf("%c",200);
 gotoxy(60,31);        //This is the bottom right corner.
 cprintf("%c",188);
 for(y=24;y<=30;y++)   //This is the loop that makes the vertical lines.
 {
  gotoxy(23,y);
  cprintf("%c",186);
  gotoxy(60,y);
  cprintf("%c",186);
 }
 y=23;                 //Resetting variable values for use in next loop.
 x=24;
 for(x=24;x<60;x++)    //This is the loop that makes the horizontal lines.
 {
  gotoxy(x,y);
  cprintf("%c",205);
  gotoxy(x,31);
  cprintf("%c",205);
  gotoxy(x,29);
  cprintf("%c",196);
 }
 gotoxy(23,29);        //This is the 'T' for the left vertical line.
 cprintf("%c",199);
 gotoxy(60,29);        //This is the 'T' for the right vertical line.
 cprintf("%c",182);
}







void f_main_border(void) //Main border function to draw borders on menus.
{
 int x=10;             //Sets variables X,Y for horizontal and vertical lines.
 int y=14;

 gotoxy(10,13);        //This is the top left corner.
 cprintf("%c",201);
 gotoxy(74,13);        //This is the top right corner.
 cprintf("%c",187);
 gotoxy(10,34);        //This is the bottom left corner.
 cprintf("%c",200);
 gotoxy(74,34);        //This is the bottom right corner.
 cprintf("%c",188);

 for(y=14;y<=33;y++)   //This loop makes the vertical lines on both sides.
 {
  gotoxy(x,y);
  cprintf("%c",186);
  gotoxy(x+64,y);
  cprintf("%c",186);
 }
 y=13;                 //Resetting variable values for use in next loop.
 x=11;
 for(x=11;x<74;x++)    //This loop makes the horizontal lines above and below.
 {
  gotoxy(x,y);
  cprintf("%c",205);
  gotoxy(x,y+2);
  cprintf("%c",196);
  gotoxy(x,y+21);
  cprintf("%c",205);
 }
 gotoxy(10,y+2);        //This is the 'T' for the left vertical line.
 cprintf("%c",199);
 gotoxy(74,y+2);        //This is the 'T' for the right vertical line.
 cprintf("%c",182);
}


void f_dialog_border()
{
 int x=8;
 int y=20;
 gotoxy(7,20);         //This is the top left corner.
 cprintf("%c",201);
 gotoxy(77,20);        //This is the top right corner.
 cprintf("%c",187);
 gotoxy(7,31);         //This is the bottom left corner.
 cprintf("%c",200);
 gotoxy(77,31);        //This is the bottom right corner.
 cprintf("%c",188);
 for(x=8;x<=76;x++)    //This loop creates the horizontal lines.
 {
  gotoxy(x,y);
  cprintf("%c",205);
  gotoxy(x,y+11);
  cprintf("%c",205);
 }
 y=21;
 for(y=21;y<31;y++)    //This loop creates the vertical lines.
 {
  gotoxy(7,y);
  cprintf("%c",186);
  printf("\t\t\t\t\t\t\t\t\t");
  gotoxy(77,y);
  cprintf("%c",186);
 }
 gotoxy(13,23);
}





char f_encrypt_password(char lv_pass[])  //Encrypts password for security.
{
 int lv_counter=0;
 int lv_length=strlen(lv_pass);
 for(lv_counter=0;lv_counter<=lv_length;lv_counter++)  //Changes every character in password string.
 {
  lv_pass[lv_counter]=2*lv_pass[lv_counter]+15;
 }
 return lv_pass[v_length];   //Returns encrypted password to last function.
}




void f_student_options(void)    //Student Options Menu function.
{
 int lv_counter=1;
 int lv_choice=0;
 int lv_s_options=0;
 do{
  clrscr();
  gotoxy(34,14);
  printf("Student Options\n");     //Menu title.
  for(lv_counter=1;lv_counter<=4;lv_counter++)  //Loop lays out numbers in menu.
  {
   printf("\n\n\t\t%i.",lv_counter);
  }
  gotoxy(19,17);
  printf("Add Student");            //1.
  gotoxy(19,19);
  printf("Search for Student");     //2.
  gotoxy(19,21);
  printf("Remove Student");         //3.
  gotoxy(19,23);
  printf("Return to Main Menu");    //4.
  gotoxy(17,29);
  printf("Input:");
  f_main_border();
  gotoxy(23,29);
  scanf("%i",&lv_s_options);
  v_garbage=getchar();
   lv_s_options;
  switch(lv_s_options)
   {
    case 1:                        //Add Student.
     f_add_student();
     lv_choice=0;
     return;
    case 2:                        //Search for Student.
     f_search_student();
     lv_choice=0;
     return;
    case 3:                        //Remove Student.
     f_remove_student();
     lv_choice=0;
     return;
    case 4:                        //Return to Main Menu.
     lv_choice=1;
     break;
    default:
     f_dialog_border();
     gotoxy(19,25);
     printf("Invalid entry. Please use numeric values only.");
     lv_choice=0;
     getch();
     return;
   }
 }while(!lv_choice);
}



void f_add_student(void)
{
 int lv_id;
 student_rec s_students;
 char lv_continue;
 int lv_cancel;
 clrscr();
 if((file_student_rec=fopen(c_student_rec,"rb+"))==NULL)
  {
   f_dialog_border();
   gotoxy(13,24);
   printf("First student addition, a file will be created to store your");
   gotoxy(37,27);
   printf("information.");
   getch();
   s_students.id=1;
   clrscr();
   file_student_rec=fopen(c_student_rec,"a+");
  }
 else
  {
   do{
 //   lv_id=s_students.id;
   }while(fread(&s_students,sizeof(student_rec),1,file_student_rec));
 //  }while(!feof(file_student_rec));
   s_students.id=lv_id+1;
  }
 f_clear_variable(s_students.fname);
 f_clear_variable(s_students.lname);
 f_clear_variable(s_students.address);
 f_clear_variable(s_students.phone);
 s_students.age=0;
 s_students.gender=0x00;
 do{
  clrscr();
  gotoxy(36,14);
  printf("Add Student");
  gotoxy(15,17);
  printf("ID: %05i",s_students.id);
  gotoxy(15,19);
  printf("First Name:");
  gotoxy(15,21);
  printf("Last Name:");
  gotoxy(15,23);
  printf("Address:");
  gotoxy(15,25);
  printf("Age:");
  gotoxy(15,27);
  printf("Gender:");
  gotoxy(15,29);
  printf("Phone Number:");
  f_main_border();
  gotoxy(28,19);
  gets(s_students.fname);
  gotoxy(27,21);
  gets(s_students.lname);
  gotoxy(24,23);
  gets(s_students.address);
  gotoxy(20,25);
  scanf("%i",&s_students.age);
  v_garbage=getchar();
  gotoxy(23,27);
  scanf("%c",&s_students.gender);
  v_garbage=getchar();
  gotoxy(30,29);
  gets(s_students.phone);
  f_dialog_border();
  printf("Are you sure you want to add this student to student records[y/n]?");
  scanf("%c",&lv_continue);
  v_garbage=getchar();
  if(lv_continue=='n' || lv_continue=='N')
   lv_cancel=1;
  else
   lv_cancel=0;
 }while(lv_cancel==1);
 s_students.s_grades.History=0;
 s_students.s_grades.Geography=0;
 s_students.s_grades.Math=0;
 s_students.s_grades.English=0;
 s_students.s_grades.Humanities=0;
 s_students.s_grades.Science=0;
 s_students.s_grades.Art=0;
 s_students.s_grades.PE=0;
 fwrite(&s_students,sizeof(student_rec),1,file_student_rec);
 fclose(file_student_rec);
}


void f_search_student(void)
{
 clrscr();
 getch();
}


void f_remove_student(void)
{
 clrscr();
 getch();
}


char f_clear_variable(char lv_dirty[])        //Cleans out array for re-use.
{
 int lv_counter=0;
 for(lv_counter=0;lv_counter<50;lv_counter++)
 {
  lv_dirty[lv_counter]=0x00;
 }
 return lv_dirty[strlen(lv_dirty)];
}

And also attached the same code in *.cpp in case that is easier to open with Turbo C. Thanks a lot for the help!!

Originally Posted by PHGDAL

Sorry for really late reply. Anyway, here's the code for the whole program so far, it's not complete.

Code:

//Global variables are marked as v_*
//Local variables are marked as lv_*
//Axes variables are named as x and y
//Functions are marked as f_*
//Files are marked as file_*
//File locations are marked as c_*
//Structures are marked as s_*
#include<conio.h>
#include<string.h>
#include<stdio.h>
#include<ctype.h>
#define v_length 17
void f_loginapproved(void);    //Function prototypes.
void f_logout(void);
void f_read_pass(void);
void f_change_password(void);
void f_write_pass(char[v_length]);
void f_login_border(void);
void f_main_border(void);
void f_main_options(void);
void f_student_options(void);
char f_encrypt_password(char[v_length]);
void f_add_student(void);
void f_search_student(void);
void f_remove_student(void);
void f_dialog_border(void);
char f_clear_variable(char[]);
char v_uname[v_length]="Admin001";  //Default username and password global variables.
char v_passw[v_length]="password";
char c_filename[20]="login.dat"; //Password file for login.
char c_student_rec[20]="stud.dat";
char c_staff_rec[20]="staff.dat";
char v_garbage[20];
FILE *file_password;
FILE *file_student_rec;
FILE *file_staff_rec;
struct sgrades
{
  int History;
  int Geography;
  int Math;
  int English;
  int Humanities;
  int Science;
  int Art;
  int PE;
};
struct student_rec
{
  int id;
  char fname[15];
  char lname[15];
  char address[50];
  int age;
  char gender;
  char phone[15];
  sgrades s_grades;
};
struct staff_rec
{
  char fname[15];
  char lname[15];
  char address[50];
  int age;
  int id;
  long int phone;
  char gender;
  double monthly_pay;
};


void main(void)    //Main function used as login screen.
{
 clrscr();
 f_read_pass();            //Moves to function to update password variable.
 char lv_name[v_length]="";         //Sets local input variables for login.
 char lv_pass[v_length]="";
 int lv_valid;             //Sets variable to count attempts in loop.
 int lv_attempt=0;
 do{
  f_login_border();        //Draws login border.
  gotoxy(32,25);
  printf("Username:");     //Displays username and password labels.
  gotoxy(32,27);
  printf("Password:");
  gotoxy(43,25);
  gets(lv_name);           //Gets input of username and password from user.
  gotoxy(43,27);
  gets(lv_pass);
  f_encrypt_password(lv_pass);
  if(strcmp(lv_name,v_uname)!=0 || strcmp(lv_pass,v_passw)!=0)    //Compares inputted password and username with file-saved password and default username.
   {
    lv_attempt++;
    lv_valid=0;
    gotoxy(27,30);
    printf("Incorrect username or password"); //Error message if wrong input.
    getch();
    clrscr();
   }
  else                   //If input is correct local variable valid is 1.
    lv_valid=1;
  }while(!lv_valid && lv_attempt<3);  //Loops until more than 3 tries or valid is 1.
  if(lv_attempt>2 && !lv_valid)
   {
    gotoxy(18,30);
    printf("Sorry, maximum of three(3) attempts reached");  //Error message after 3 wrong tries.
    getch();
   }
  else
   {
    f_loginapproved();   //Main menu function to display all options.
   }
}



void f_loginapproved(void) //LoginApproved function to enter menu after login.
{
 int lv_mainmenu=0;    //Sets variable for user input.
 int lv_choice=0;
 int lv_counter=1;
 do{
  clrscr();
  gotoxy(37,14);
  printf("Main Menu\n");
  for(lv_counter=1;lv_counter<=5;lv_counter++)
  {
   printf("\n\n\t\t%i.",lv_counter);
  }
  gotoxy(19,17);
  printf("Main Options");       //1.
  gotoxy(19,19);
  printf("Student Options");    //2.
  gotoxy(19,21);
  printf("Staff Options");      //3.
  gotoxy(19,23);
  printf("");			//4.
  gotoxy(19,25);
  printf("Exit");               //5.
  gotoxy(17,29);
  printf("Input:");
  f_main_border();      //Draws main border around main menu.
  gotoxy(23,29);
  scanf("%i",&lv_mainmenu);
  v_garbage=getchar();
  switch(lv_mainmenu)   //Checks user input with possible answers.
  {
   case 1:              //Main Options.
   {
    f_main_options();
    break;
   }
   case 2:              //Student Options.
   {
    f_student_options();
    break;
   }
   case 3:              //Not specified.
   {
    printf("Sorry, this option is currently unavailable");
    getch();
    lv_choice=0;
    break;
   }
   case 4:              //Not specified.
   {
    printf("Sorry, this option is currently unavailable");
    getch();
    lv_choice=0;
    break;
   }
   case 5:              //Logout.
   {
    f_logout();
    lv_choice=1;
    break;
   }
   default:             //If any other character is inputted.
   {
    f_dialog_border();
    gotoxy(19,25);
    printf("Invalid entry. Please use numeric values only.");
    getch();
    lv_choice=0;
    break;
   }
  }
 }while(lv_choice==0);   //End of while loop.
}




void f_read_pass(void)   //Read password function to read saved password file.
{
 if((file_password=fopen(c_filename,"rb+"))==NULL)    //Opens password file and checks if empty.
 {
  printf("No password, default=password");
  getch();
  f_encrypt_password(v_passw);    //Encrypts default password.
  clrscr();
 }
 else
  fscanf(file_password,"%s",v_passw); //Reads password and updates variable.
 fclose(file_password);
}




void f_change_password(void)  //Password function to edit password variables.
{
 char lv_pass[v_length]="";
 clrscr();
 f_main_border();
 gotoxy(34,14);
 printf("Change Password");
 gotoxy(15,16);
 printf("Use this option to change your login password. Make sure");
 gotoxy(17,17);
 printf("it is a password that you remember. Your password is");
 gotoxy(19,18);
 printf("encrypted and safely stored until next login.");
 gotoxy(15,23);
 printf("Enter current password: ");  //Current password test before edit.
 gets(lv_pass);
 f_encrypt_password(lv_pass);
 if(strcmp(lv_pass,v_passw)!=0)   //Asks for current password before prompting for new password.
 {
  f_dialog_border();
  printf("Wrong current password entered. The password has not been");
  gotoxy(14,26);
  printf("changed. Press any key to return to Main Options menu...");    //Error message, does not change password and returns to main menu.
  getch();
 }
 else
 {
  gotoxy(15,28);
  printf("Enter new password [17 characters max]: ");   //Request new password.
  f_clear_variable(lv_pass);   //Empties lv_pass array to be used.
  gets(lv_pass);
  v_garbage=getchar();
  f_write_pass(lv_pass);      //Sends lv_pass array to function as argument.
  f_dialog_border();
  gotoxy(29,25);
  printf("Password has been changed.");
  getch();
 }
}




void f_write_pass(char lv_npass[])     //Password writing function to edit password.
{
 f_encrypt_password(lv_npass);   //Sends lv_pass to be encrypted before continue.
 strncpy(v_passw,lv_npass,v_length);   //Updates global variable with new password.
 file_password=fopen(c_filename,"wb+"); //Erases old password file with blank.
 fprintf(file_password,"%s",v_passw);  //Saves new password in blank file.
 fclose(file_password);
}




void f_logout(void)        //Logout function to exit program at main menu.
{
 char lv_cancel;
 f_dialog_border();
 gotoxy(22,25);
 printf("Logging out. Press any key to exit program..."); //Displays logout message.
 getch();
}





void f_main_options(void)   //Main options funtion to personalise menu.
{
 int lv_options=0;
 int lv_choice=0;
 int lv_counter=1;
 do{
  clrscr();
  gotoxy(35,14);
  printf("Main Options\n");                 //Title of menu.
  for(lv_counter=1;lv_counter<=5;lv_counter++)    //Loop lays out numbers for menu.
  {
   printf("\n\n\t\t%i.",lv_counter);
  }
  gotoxy(19,17);
  printf("Change Password");      //1.
  gotoxy(19,25);
  printf("Return to Main Menu");  //5.
  gotoxy(17,29);
  printf("Input:");
  f_main_border();       //Draws main border around labels.
  gotoxy(23,29);
  scanf("%i",&lv_options);    //Gets user input.
  v_garbage=getchar();
  switch(lv_options)
  {
   case 1:                    //Change Password.
    {
     f_change_password();
     lv_choice=0;
     break;
    }
   case 2:                    //Not Specified.
    {
     f_dialog_border();
     printf("Sorry, this option is currently unavailable");
     getch();
     lv_choice=0;
     break;
    }
   case 3:                    //Not Specified.
    {
     f_dialog_border();
     printf("Sorry, this option is currently unavailable");
     getch();
     lv_choice=0;
     break;
    }
   case 4:                    //Not Specified.
    {
     f_dialog_border();
     printf("Sorry, this option is currently unavailable");
     getch();
     lv_choice=0;
     break;
    }
   case 5:                    //Return to Main Menu.
    {
     lv_choice=1;
     break;
    }
   default:                   //If any other characters are inputted.
    {
     f_dialog_border();
     gotoxy(19,25);
     printf("Invalid entry. Please use numeric values only.");
     getch();
     lv_choice=0;
     break;
    }
  }
 }while(!lv_choice);          //End of while loop.
}





void f_login_border(void)   //Login border function to draw border on login.
{
 int x=23;             //Sets variables X,Y as horizontal and vertical lines.
 int y=24;

 gotoxy(x,x);          //This is the top left corner.
 cprintf("%c",201);
 gotoxy(60,x);         //This is the top right corner.
 cprintf("%c",187);
 gotoxy(x,31);         //This is the bottom left corner.
 cprintf("%c",200);
 gotoxy(60,31);        //This is the bottom right corner.
 cprintf("%c",188);
 for(y=24;y<=30;y++)   //This is the loop that makes the vertical lines.
 {
  gotoxy(23,y);
  cprintf("%c",186);
  gotoxy(60,y);
  cprintf("%c",186);
 }
 y=23;                 //Resetting variable values for use in next loop.
 x=24;
 for(x=24;x<60;x++)    //This is the loop that makes the horizontal lines.
 {
  gotoxy(x,y);
  cprintf("%c",205);
  gotoxy(x,31);
  cprintf("%c",205);
  gotoxy(x,29);
  cprintf("%c",196);
 }
 gotoxy(23,29);        //This is the 'T' for the left vertical line.
 cprintf("%c",199);
 gotoxy(60,29);        //This is the 'T' for the right vertical line.
 cprintf("%c",182);
}







void f_main_border(void) //Main border function to draw borders on menus.
{
 int x=10;             //Sets variables X,Y for horizontal and vertical lines.
 int y=14;

 gotoxy(10,13);        //This is the top left corner.
 cprintf("%c",201);
 gotoxy(74,13);        //This is the top right corner.
 cprintf("%c",187);
 gotoxy(10,34);        //This is the bottom left corner.
 cprintf("%c",200);
 gotoxy(74,34);        //This is the bottom right corner.
 cprintf("%c",188);

 for(y=14;y<=33;y++)   //This loop makes the vertical lines on both sides.
 {
  gotoxy(x,y);
  cprintf("%c",186);
  gotoxy(x+64,y);
  cprintf("%c",186);
 }
 y=13;                 //Resetting variable values for use in next loop.
 x=11;
 for(x=11;x<74;x++)    //This loop makes the horizontal lines above and below.
 {
  gotoxy(x,y);
  cprintf("%c",205);
  gotoxy(x,y+2);
  cprintf("%c",196);
  gotoxy(x,y+21);
  cprintf("%c",205);
 }
 gotoxy(10,y+2);        //This is the 'T' for the left vertical line.
 cprintf("%c",199);
 gotoxy(74,y+2);        //This is the 'T' for the right vertical line.
 cprintf("%c",182);
}


void f_dialog_border()
{
 int x=8;
 int y=20;
 gotoxy(7,20);         //This is the top left corner.
 cprintf("%c",201);
 gotoxy(77,20);        //This is the top right corner.
 cprintf("%c",187);
 gotoxy(7,31);         //This is the bottom left corner.
 cprintf("%c",200);
 gotoxy(77,31);        //This is the bottom right corner.
 cprintf("%c",188);
 for(x=8;x<=76;x++)    //This loop creates the horizontal lines.
 {
  gotoxy(x,y);
  cprintf("%c",205);
  gotoxy(x,y+11);
  cprintf("%c",205);
 }
 y=21;
 for(y=21;y<31;y++)    //This loop creates the vertical lines.
 {
  gotoxy(7,y);
  cprintf("%c",186);
  printf("\t\t\t\t\t\t\t\t\t");
  gotoxy(77,y);
  cprintf("%c",186);
 }
 gotoxy(13,23);
}





char f_encrypt_password(char lv_pass[])  //Encrypts password for security.
{
 int lv_counter=0;
 int lv_length=strlen(lv_pass);
 for(lv_counter=0;lv_counter<=lv_length;lv_counter++)  //Changes every character in password string.
 {
  lv_pass[lv_counter]=2*lv_pass[lv_counter]+15;
 }
 return lv_pass[v_length];   //Returns encrypted password to last function.
}




void f_student_options(void)    //Student Options Menu function.
{
 int lv_counter=1;
 int lv_choice=0;
 int lv_s_options=0;
 do{
  clrscr();
  gotoxy(34,14);
  printf("Student Options\n");     //Menu title.
  for(lv_counter=1;lv_counter<=4;lv_counter++)  //Loop lays out numbers in menu.
  {
   printf("\n\n\t\t%i.",lv_counter);
  }
  gotoxy(19,17);
  printf("Add Student");            //1.
  gotoxy(19,19);
  printf("Search for Student");     //2.
  gotoxy(19,21);
  printf("Remove Student");         //3.
  gotoxy(19,23);
  printf("Return to Main Menu");    //4.
  gotoxy(17,29);
  printf("Input:");
  f_main_border();
  gotoxy(23,29);
  scanf("%i",&lv_s_options);
  v_garbage=getchar();
   lv_s_options;
  switch(lv_s_options)
   {
    case 1:                        //Add Student.
     f_add_student();
     lv_choice=0;
     return;
    case 2:                        //Search for Student.
     f_search_student();
     lv_choice=0;
     return;
    case 3:                        //Remove Student.
     f_remove_student();
     lv_choice=0;
     return;
    case 4:                        //Return to Main Menu.
     lv_choice=1;
     break;
    default:
     f_dialog_border();
     gotoxy(19,25);
     printf("Invalid entry. Please use numeric values only.");
     lv_choice=0;
     getch();
     return;
   }
 }while(!lv_choice);
}



void f_add_student(void)
{
 int lv_id;
 student_rec s_students;
 char lv_continue;
 int lv_cancel;
 clrscr();
 if((file_student_rec=fopen(c_student_rec,"rb+"))==NULL)
  {
   f_dialog_border();
   gotoxy(13,24);
   printf("First student addition, a file will be created to store your");
   gotoxy(37,27);
   printf("information.");
   getch();
   s_students.id=1;
   clrscr();
   file_student_rec=fopen(c_student_rec,"a+");
  }
 else
  {
   do{
 //   lv_id=s_students.id;
   }while(fread(&s_students,sizeof(student_rec),1,file_student_rec));
 //  }while(!feof(file_student_rec));
   s_students.id=lv_id+1;
  }
 f_clear_variable(s_students.fname);
 f_clear_variable(s_students.lname);
 f_clear_variable(s_students.address);
 f_clear_variable(s_students.phone);
 s_students.age=0;
 s_students.gender=0x00;
 do{
  clrscr();
  gotoxy(36,14);
  printf("Add Student");
  gotoxy(15,17);
  printf("ID: %05i",s_students.id);
  gotoxy(15,19);
  printf("First Name:");
  gotoxy(15,21);
  printf("Last Name:");
  gotoxy(15,23);
  printf("Address:");
  gotoxy(15,25);
  printf("Age:");
  gotoxy(15,27);
  printf("Gender:");
  gotoxy(15,29);
  printf("Phone Number:");
  f_main_border();
  gotoxy(28,19);
  gets(s_students.fname);
  gotoxy(27,21);
  gets(s_students.lname);
  gotoxy(24,23);
  gets(s_students.address);
  gotoxy(20,25);
  scanf("%i",&s_students.age);
  v_garbage=getchar();
  gotoxy(23,27);
  scanf("%c",&s_students.gender);
  v_garbage=getchar();
  gotoxy(30,29);
  gets(s_students.phone);
  f_dialog_border();
  printf("Are you sure you want to add this student to student records[y/n]?");
  scanf("%c",&lv_continue);
  v_garbage=getchar();
  if(lv_continue=='n' || lv_continue=='N')
   lv_cancel=1;
  else
   lv_cancel=0;
 }while(lv_cancel==1);
 s_students.s_grades.History=0;
 s_students.s_grades.Geography=0;
 s_students.s_grades.Math=0;
 s_students.s_grades.English=0;
 s_students.s_grades.Humanities=0;
 s_students.s_grades.Science=0;
 s_students.s_grades.Art=0;
 s_students.s_grades.PE=0;
 fwrite(&s_students,sizeof(student_rec),1,file_student_rec);
 fclose(file_student_rec);
}


void f_search_student(void)
{
 clrscr();
 getch();
}


void f_remove_student(void)
{
 clrscr();
 getch();
}


char f_clear_variable(char lv_dirty[])        //Cleans out array for re-use.
{
 int lv_counter=0;
 for(lv_counter=0;lv_counter<50;lv_counter++)
 {
  lv_dirty[lv_counter]=0x00;
 }
 return lv_dirty[strlen(lv_dirty)];
}

And also attached the same code in *.cpp in case that is easier to open with Turbo C. Thanks a lot for the help!!

8192k warning

Is that the limit? Does this mean I'll need to make a new *.cpp file?

Ok, I just found out that my Turbo C is version 3.0 which was released in 1991, maybe the one that you guys use is the one released in 2006 and thats why its not looking the exact same. I'm downloading the newer one because this one has been giving me a lot of compatibility issues. I'll see if the error's fixed after running on the new version and then I'll post here again. Thanks to everyone who helped!

The abnormal program termination error has disappeared!! Thanks everyone for helping improve the program in other ways, though it didn't help fix the main problem, it helped everything else. Thanks!!