Code:
//C LIBRARIES HERE-------
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
//STRUCTURES HERE-------
//Course structure
typedef struct
{
char courseCode[4];
char courseName[30];
int maxPlaces;
float courseCost;
} Course;
//VARIABLES AND OTHER STUFF HERE-------
//Build Course Array with a 5 courses limit
Course courses[5];
//Array / index position keeper
int position = 0;
//Specify file for storing course data
char fileName[] = "courses.dat";
//FUNCTION PROTOTYPES HERE-------
void mainMenu();
void viewCourses();
void modifyCourse();
void addCourse();
void filterInput(Course courses[]);
int readData(char fileName[], Course courses[], int position);
void writeData(char fileName[], Course courses[], int position);
void limitError(); //Extra function not in Structure Chart YET!!!
void parseData(); //Extra function not in Structure Chart YET!!!
//MAIN PROGRAM HERE-------
int main()
{
//Calls main menu function - First port of call for the program user
mainMenu();
//System stuff - pauses program and returns an int value of 0 to main - (Tells the program it ran without fault)
system("pause");
return 0;
}
//FUNCTIONS CONSTRUCTED HERE-------
//Main Menu Function
void mainMenu()
{
//stores the menu selection
char mainMenuOption;
system("cls");
printf(" ----------------------------------\n");
printf("| TRAINING COURSE SYSTEM - ALPHA |\n");
printf(" ----------------------------------\n\n");
printf("PLEASE SELECT AN OPTION:\n\n");
printf("(1) View All Courses\n");
printf("(2) Modify Course\n");
printf("(3) Add New Course\n\n");
mainMenuOption = getchar();
_flushall();
//Read data file when program starts and update position keeper according to number of course records stored
//This only needs to be called here because it gathers and returns the data needed for all the other functions too!
position = readData(fileName, courses, position);
switch(mainMenuOption)
{
case '1':
if(position <= 0)
{
system("cls");
printf("\nThere are no courses to display yet! \n\n");
system("pause");
mainMenu();
}
//Show the stored data
viewCourses();
break;
case '2':
modifyCourse();
break;
case '3':
if(position < 5)
{
addCourse();
}
else
{
//Show limit reached error
limitError();
}
break;
default:
system("cls");
printf("Invalid menu option selected.\n\n");
sleep(2000);
mainMenu();
break;
}
}
//View Stored Courses Function
void viewCourses()
{
system("cls");
printf(" ---------------------------\n");
printf("| CURRENTLY STORED COURSES |\n");
printf(" ---------------------------\n");
//Mini storage limit check and warning
if(position >= 5)
{
printf("\nWARNING: Trial Storage Limit Reached \n\n");
}
printf("-------------------------------------\n");
// performed if the students array contains at least one record
parseData();
printf("\n\n");
printf("----------------------------------------------------\n");
printf("Total courses stored: %i\n", position);
printf("----------------------------------------------------\n\n");
printf("WOULD YOU LIKE TO ADD A COURSE?\n\n");
char addAnotherOption;
scanf("%c", &addAnotherOption);
_flushall();
//Check storage limit before allowing the storing of more courses
if(addAnotherOption == 'Y' || addAnotherOption == 'y')
{
if(position < 5)
{
addCourse();
}
else if(position >= 5)
{
//Show limit reached error
limitError();
}
}
if(addAnotherOption == 'N' || addAnotherOption == 'n')
{
mainMenu();
}
}
//Modify Course Function
void modifyCourse()
{
system("cls");
printf(" ------------------\n");
printf("| MODIFY A COURSE |\n");
printf(" ------------------\n\n");
if(position <= 0)
{
printf("No data to modify\n");
}
parseData();
printf("\n\nENTER THE COURSE CODE FOR THE COURSE TO BE CHANGED:\n");
char courseCode[4];
fgets(courseCode, sizeof(courseCode), stdin);
_flushall();
}
//Add a Course Function
void addCourse()
{
//Course entry data confirmation while loop option variable
char preConfirmationOption;
//Course entry data Confirmation while loop used for verification that the course details are correct before proceeding
while(preConfirmationOption != 'y' && preConfirmationOption !='Y')
{
system("cls");
printf(" --------------\n");
printf("| ADD A COURSE |\n");
printf(" --------------\n\n");
printf("You may add a course by following\n");
printf("the on screen instructions below.\n\n");
//Get courseCode
printf("ENTER COURSE CODE:\n");
fgets(courses[position].courseCode, sizeof(courses[position].courseCode), stdin);
_flushall();
//Get courseName
printf("\nENTER COURSE TITLE:\n");
fgets(courses[position].courseName, sizeof(courses[position].courseName), stdin);
_flushall();
//Get maxPlaces
printf("\nENTER MAXIMUM NUMBER OF PLACES:\n");
scanf("%i", &courses[position].maxPlaces);
_flushall();
//Get courseCost
printf("\nENTER COURSE COST:\n");
scanf("%f", &courses[position].courseCost);
_flushall();
//Show the current course entry and all its data - list number of courses e.g. 1 of 5, 2 of 5 etc
//Prompt user to review and verify course data is correct before storing to file
system("cls");
//Filter the input here before showing the data for verification and saving
//Now throwing incompatible pointer type argument!!!!!!!!!!!!!!!!!!!!!!!!!!
filterInput(courses);
//Display the course details entered back to user for verification
printf("----------------------------------------\n");
printf("| VERIFY COURSE DETAILS BEFORE STORING |\n");
printf("----------------------------------------\n");
printf("\t\n\n%s %s %i %c%0.2f\n\n\n",
courses[position].courseCode,
courses[position].courseName,
courses[position].maxPlaces, 156, //156 Displays Pound Sterling Symbol
courses[position].courseCost
);
//Prompt the user for some action to verify if the details are correct or incorrect
printf("IS THE COURSE DATA CORRECT? (Y or N):\n\n");
//Get users verification input response
scanf("%c", &preConfirmationOption);
_flushall();
}//End data verification while loop
//Adds one to array position keeper variable - Keeps a track of the array position e.g. stored course entry 1, 2, 3 etc...
position++;
//Verification & storage confirmation message
system("cls");
printf("-------------------------------------\n");
printf("| COURSE DETAILS HAVE BEEN VERIFIED |\n");
printf("-------------------------------------\n\n");
printf("The data has been written to file.\n");
//Start the write data process
writeData(fileName, courses, position);
//display course count - TESTING PURPOSES
printf("\nNumber of Courses Currently Stored: %i of 5\n\n", position);
//Add another course option variable
char addAnotherOption;
//Prompt user to enter another course
printf("WOULD YOU LIKE TO ADD ANOTHER COURSE?\n\n");
scanf("%c", &addAnotherOption);
_flushall();
//Conditional if blocks to check to see if the course limit has been reached before allowing another course entry
//If course limit has been reached, return user to main menu after brief warning / info message
if(addAnotherOption == 'Y' || addAnotherOption == 'y')
{
if(position < 5)
{
addCourse();
}
else if(position >= 5)
{
//Show limit reached error
limitError();
}
}
if(addAnotherOption == 'N' || addAnotherOption == 'n')
{
mainMenu();
}
}//End addCourse()
//Clean Input Data Before Saving Anywhere Function - (Deals with '/n' only at the moment)
//Wouldn't let me pass both courseName & courseCode to strlen so had to make two instances of the check code
void filterInput(Course courses[])
{
//CHECK courseCode VARIABLE FOR NEW LINE CHARACTER-----
int x = strlen(courses[position].courseCode) -1;
if(courses[position].courseCode[x] == '\n')
{
courses[position].courseCode[x] = '\0';
}
//CHECK courseName VARIABLE FOR NEW LINE CHARACTER-----
x = strlen(courses[position].courseName) -1;
if(courses[position].courseName[x] == '\n')
{
courses[position].courseName[x] = '\0';
}
}
//Read Data from file Function - Adapted from populate students example
int readData(char fileName[], Course courses[], int position)
{
FILE *courseFile;
courseFile = fopen(fileName, "rb");
if (courseFile != NULL)
{
int i = -1;
fread(&position, sizeof(int), 1, courseFile);
while (i < position)
{
i++;
fread(&courses[i], sizeof(Course), 1, courseFile);
}
fclose(courseFile);
}
return position;
}
//parses the stored data for showing anywhere when called
void parseData()
{
int i;
if (position >= 0)
{
printf("Code\t Name\t\t Places\t Cost\n");
printf("-------------------------------------\n");
// repeats until all of the students' details have been displayed
for (i = 0; i <= position -1; i++)
{
printf("%s\t%s\t%i\t%0.2f\n", courses[i].courseCode,
courses[i].courseName,
courses[i].maxPlaces,
courses[i].courseCost);
}
}
}
//Write Data to File Function
void writeData(char fileName[], Course courses[], int position)
{
if(position >= 0)
{
FILE *courseFile = fopen(fileName, "wb");
int i;
fwrite(&position, sizeof(int), 1, courseFile);
for(i = 0; i <= position; i++)
{
fwrite(&courses[i], sizeof(Course), 1, courseFile);
}
fclose(courseFile);
}
}
void limitError()
{
system("cls");
printf("---------------------------------------------------------------\n");
printf("WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING\n");
printf("---------------------------------------------------------------\n\n");
printf("You Have Reached Your Trial Version Course Storage Limit.\n\n");
printf("To unlock this program, please send me all your money!\n\n");
printf("You will now be returned to the main menu\n\n");
//Sleep tells the program to wait for a specified duration before proceeding
sleep(8000);
mainMenu();
}
Originally Posted by DrC
