Student record system; file handling
Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#include <windows.h>
struct student{
int ID_no;
char fname[20];
char mname[20];
char lname[20];
char course_year[20];
char bdate[20];
char contnum[20];
char mark[20];
};
struct student stu;
COORD coord = {0,0}; ///set the cordinate to 0, 0 (top-left corner of window);
void gotoxy(int x, int y){
coord.X = x; coord.Y = y; /// X and Y coordinates
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void SetColor(int ForgC)
{
WORD wColor;
///We will need this handle to get the current background attribute
HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO csbi;
///We use csbi for the wAttributes word.
if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
{
///Mask out all but the background attribute, and add in the forgournd color
wColor = (csbi.wAttributes & 0xF0) + (ForgC & 0x0F);
SetConsoleTextAttribute(hStdOut, wColor);
}
return;
}
void header(){
system("cls");
SetColor(23);
gotoxy(28,2);
printf("STUDENT RECORD SYSTEM");
gotoxy(25,3);
printf("COLLEGE OF COMPUTER STUDIES");
gotoxy(21,4);
printf("XAVIER UNIVERSITY - ATENEO DE CAGAYAN");
SetColor(14);
}
int main(){
int flag,choice,found,continu,length,select,isFound=0;
float gra; /* Main menu */
char student_lname[20];
int IDno;
int align_ask=5,align_menu=20;
FILE *fp;
FILE *origF;
FILE *newF;
do{
system("cls");
header();
gotoxy(align_menu,7);printf("\n\t\t ======================================");
gotoxy(align_menu,8);printf("\n\t\t | CHOICES: |");
gotoxy(align_menu,9);printf("\n\t\t | |");
gotoxy(align_menu,10);printf("\n\t\t | [1] Add Student |");
gotoxy(align_menu,11);printf("\n\t\t | [2] Search Student Record |");
gotoxy(align_menu,12);printf("\n\t\t | [3] Modify Student Record |");
gotoxy(align_menu,13);printf("\n\t\t | [4] Update Student Mark |");
gotoxy(align_menu,14);printf("\n\t\t | [5] Delete Student |");
gotoxy(align_menu,15);printf("\n\t\t | [6] Letter Grade Converter |");
gotoxy(align_menu,16);printf("\n\t\t | [7] Change Database Password |");
gotoxy(align_menu,17);printf("\n\t\t | [8] Exit Program |");
gotoxy(align_menu,18);printf("\n\t\t ======================================");
SetColor(10);printf("\n\t\t\tChoice: ");
scanf("%d", &select);
if(select==1){ /* Choice1 */
while(choice!=2){
header();
gotoxy(align_menu,7);printf("\n\t\t ======================================");
gotoxy(align_menu,8);printf("\n\t\t | MENU: |");
gotoxy(align_menu,9);printf("\n\t\t | |");
gotoxy(align_menu,10);printf("\n\t\t | [1] Add New Student |");
gotoxy(align_menu,11);printf("\n\t\t | [2] Back to Main Menu |");
gotoxy(align_menu,12);printf("\n\t\t ======================================");
SetColor(10);printf("\n\t\t\tChoice: ");
scanf("%d", &choice);
switch(choice){
case 1:
system("cls");
header();
gotoxy(align_menu,5);printf("\n\t\t\t\t-ADD STUDENT-");
gotoxy(align_menu,6);printf("\n\t\tID no: ");
scanf("%d", &stu.ID_no);
gets(stu.fname);
gotoxy(align_menu,7);printf("\n\t\tFirst Name: ");
gets(stu.fname);
gotoxy(align_menu,8);printf("\n\t\tLast Name: ");
gets(stu.lname);
gotoxy(align_menu,9);printf("\n\t\tCourse and Year: ");
gets(stu.course_year);
gotoxy(align_menu,10);printf("\n\t\tBirthdate(MM-DD-YY): ");
gets(stu.bdate);
gotoxy(align_menu,11);printf("\n\t\tContact Number: ");
gets(stu.contnum);
gotoxy(align_menu,12);printf("\n\t\tCurrent Mark(1-100): ");
gets(stu.mark);
fp=fopen("studentfile.txt","a+");
fprintf(fp,"\nID no: %d\n",stu.ID_no);
fprintf(fp,"First Name: %s\n",stu.fname);
fprintf(fp,"Last Name: %s\n",stu.lname);
fprintf(fp,"Course and Year: %s\n",stu.course_year);
fprintf(fp,"Birthdate: %s\n",stu.bdate);
fprintf(fp,"Contact Number: %s\n\n",stu.contnum);
fprintf(fp,"Current Mark: %s\n\n",stu.mark);
fclose(fp);
system("cls");
MessageBox(0,"A new student record has been added successfully","Student Record System",0);
}
}
}
choice=1;
if(select==2){ /* Choice2 */
while(choice!=2){
header();
gotoxy(align_menu,7);printf("\n\t\t ======================================");
gotoxy(align_menu,8);printf("\n\t\t | MENU: |");
gotoxy(align_menu,9);printf("\n\t\t | |");
gotoxy(align_menu,10);printf("\n\t\t | [1] Search A Student |");
gotoxy(align_menu,11);printf("\n\t\t | [2] Back to Main Menu |");
gotoxy(align_menu,12);printf("\n\t\t ======================================");
SetColor(10);printf("\n\t\t\tChoice: ");
scanf("%d", &choice);
switch(choice){
case 1:{
system("cls");
header();
gotoxy(align_menu,5);printf("\n\t\t\t\t-SEARCH STUDENT-");
printf("\nEnter the Student's ID no. :");
scanf("%d",&IDno);
MessageBox(0,"Searching records...","Student Record System",0);
found=0;
if((fp=fopen("studentfile.txt","r"))==NULL){
printf(" ! The File is Empty...\n\n");
}
else{
while(!feof(fp)&& found==0){
fscanf(fp,"\nID no: %d\n",&stu.ID_no);
fscanf(fp,"First Name: %s\n",stu.fname);
fscanf(fp,"Last Name: %s\n",stu.lname);
fscanf(fp,"Course and Year: %s\n",stu.course_year);
fscanf(fp,"Birthdate: %s\n",stu.bdate);
fscanf(fp,"Contact Number: %s\n\n",stu.contnum);
fscanf(fp,"Current Mark: %s\n\n",stu.mark);
if(stu.ID_no==IDno)
found=1;
}
}
if(found){
system("cls");
header();
MessageBox(0,"A record was found!","Student Record System",0);
gotoxy(align_menu,10);printf("ID no: %d\n",stu.ID_no);
gotoxy(align_menu,11);printf("First Name: %s\n",stu.fname);
gotoxy(align_menu,12);printf("Last Name: %s\n",stu.lname);
gotoxy(align_menu,13);printf("Course and Year: %s\n",stu.course_year);
gotoxy(align_menu,14);printf("Birthdate: %s\n",stu.bdate);
gotoxy(align_menu,15);printf("Contact Number: %s\n\n",stu.contnum);
gotoxy(align_menu,16);printf("Current Mark: %s\n\n",stu.mark);
getch();
}
else{
MessageBox(0,"ID no does not exist!","Student Record System",0);
getch();
}
fclose(fp);
break;
}
}
}
}
choice=1;
if(select==3){ /* Choice3 */
while(choice!=2){
system("cls");
header();
gotoxy(align_menu,7);printf("\n\t\t ======================================");
gotoxy(align_menu,8);printf("\n\t\t | MENU: |");
gotoxy(align_menu,9);printf("\n\t\t | |");
gotoxy(align_menu,10);printf("\n\t\t | [1] Modify A Student |");
gotoxy(align_menu,11);printf("\n\t\t | [2] Back to Main Menu |");
gotoxy(align_menu,12);printf("\n\t\t ======================================");
SetColor(10);printf("\n\t\t\tChoice: ");
scanf("%d", &choice);
switch(choice){
case 1:{
system("cls");
header();
gotoxy(align_menu,5);printf("\n\t\t\t\t-MODIFY STUDENT-");
printf("\nEnter the Student's ID no. :");
scanf("%d",&IDno);
if((fp=fopen("studentfile.txt","rb+"))==NULL){
printf(" ! The File is Empty...\n\n");
}
else{
while(fread(&stu,sizeof(stu),1,fp) == 1){
if(IDno==stu.ID_no){
gotoxy(align_menu,6);printf("\n\t\tID no: ");
scanf("%d", &stu.ID_no);
gets(stu.fname);
gotoxy(align_menu,7);printf("\n\t\tFirst Name: ");
gets(stu.fname);
gotoxy(align_menu,8);printf("\n\t\tLast Name: ");
gets(stu.lname);
gotoxy(align_menu,9);printf("\n\t\tCourse and Year: ");
gets(stu.course_year);
gotoxy(align_menu,10);printf("\n\t\tBirthdate(MM-DD-YY): ");
gets(stu.bdate);
gotoxy(align_menu,11);printf("\n\t\tContact Number: ");
gets(stu.contnum);
gotoxy(align_menu,12);printf("\n\t\tCurrent Mark(1-100): ");
gets(stu.mark);
fseek(fp,-sizeof(stu), SEEK_CUR);
fwrite(&stu,sizeof(stu), 1, fp);
isFound = 1;
fclose(fp);
}
}
}
if(!isFound){
MessageBox(0,"No record found!","Student Record System",0);
}
fclose(fp);
break;
}
}
}
}
choice=1;
if(select==4){ /* Choice4 */
MessageBox(0,"UNDER CONSTRUCTION!","Student Record System",0);
}
choice=1;
if(select==5){ /* Choice5 */
while(choice!=2){
system("cls");
header();
gotoxy(align_menu,7);printf("\n\t\t ======================================");
gotoxy(align_menu,8);printf("\n\t\t | MENU: |");
gotoxy(align_menu,9);printf("\n\t\t | |");
gotoxy(align_menu,10);printf("\n\t\t | [1] Delete A Student |");
gotoxy(align_menu,11);printf("\n\t\t | [2] Back to Main Menu |");
gotoxy(align_menu,12);printf("\n\t\t ======================================");
printf("\n Choice: ");
scanf("%d", &choice);
switch(choice){
case 1:{
system("cls");
header();
gotoxy(align_menu,5);printf("\n\t\t\t\t-DELETE STUDENT-");
origF=fopen("studentfile.txt","rb");
newF = fopen("studentfile_temp.txt","wb");
printf("\nEnter the Student's ID no. :");
scanf("%d",&IDno);
while(fread(&stu, sizeof(stu),1,fp) == 1){
if((IDno, stu.ID_no) == 0){
fwrite(&stu,sizeof(stu),1,newF);
}
}
}
fclose(origF);
fclose(newF);
remove("studentfile.txt");
rename("studentfile_temp.txt","studentfile.txt");
MessageBox(0,"Student Record Sucessfully Deleted!","Student Record System",0);
break;
}
}
}
choice=1;
if(select==6){ /* Choice6*/
while(choice!=2){
system("cls");
header();
gotoxy(align_menu,7);printf("\n\t\t ============================================");
gotoxy(align_menu,8);printf("\n\t\t | MENU: |");
gotoxy(align_menu,9);printf("\n\t\t | |");
gotoxy(align_menu,10);printf("\n\t\t | [1] Convert Number Grade to Letter Grade |");
gotoxy(align_menu,11);printf("\n\t\t | [2] Back to Main Menu |");
gotoxy(align_menu,12);printf("\n\t\t ============================================");
printf("\n\t\t\t Choice: ");
scanf("%d", &choice);
switch(choice){
case 1:{
system("cls");
header();
printf("\n\n\n\n\t\tEnter Number Grade: ");
scanf("%f", &gra);
if(gra<=49.99){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is F.\n", gra);
MessageBox(0,"FAILED!","Student Record System",0);
}
else if(gra<=58.99){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is D.\n", gra);
MessageBox(0,"PASSED!","Student Record System",0);
}
else if(gra<=67.99){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is C.\n", gra);
MessageBox(0,"SATISFACTORY!","Student Record System",0);
}
else if(gra<=75.99){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is B-.\n", gra);
MessageBox(0,"FAIR!","Student Record System",0);;
}
else if(gra<=83.99){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is B.\n", gra);
MessageBox(0,"GOOD!","Student Record System",0);
}
else if(gra<=91.99){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is A-.\n", gra);
MessageBox(0,"VERY GOOD!","Student Record System",0);
}
else if(gra<=100){
printf("\n\n\t\t\tThe Letter Grade Equivalence of %.2f is A.\n", gra);
MessageBox(0,"EXCELLENT!","Student Record System",0);
}
else{
system("cls");
MessageBox(0,"OUT OF RANGE!","Student Record System",0);
}
getch();
}
}
}
}
choice=1;
if(select==7){ /* Choice7 */
MessageBox(0,"UNDER CONSTRUCTION!","Student Record System",0);
}
choice=1;
}while(select!=8);
return 0;
}
Hey guys, i would like to ask for a help.
I dont know how to modify the previous record that i have done in the Add Student function. i searched from different sites and got this code for modifying a record in a text file. But, i cant figure it out why its not working. could you help me please?
I REALLY NEED YOUR HELP. :(
