Suggestions for a programming assignment.

[Suhiman]

I'm trying to write program using classes to create a grade book.

This is what I have so far:

#include <stdio.h>


void addGrade(float grades[],int counter);
void removeGrade(float grades[],int counter);
void sortGrade(float grades[],int counter);
void printGrade(float grades[],int counter);
void findMinMax(float grades[],int counter);
void calcAverage(float grades[],int counter);


main()
{
    float grades[15]={87,69,98,48};
    int counter=4;
    int option;
    //Main Menu 
    do
    {printf("Select one of the options:\t");
    scanf("%d",&option);
    fflush(stdin);
    switch(option)
    {
        case 1:     //add Grades
            printf("Add Grades\n");
            addGrade(grades,counter);
            break;
        case 2://Remove Grades
            printf("Remove Grades\n");
            removeGrade(grades,counter);
            break;
        case 3://Sort Grades
            printf("Sort Grades\n");
            sortGrade(grades,counter);
            break;
        case 4://Print Grades
            printf("Print Grades\n");
            printGrade(grades,counter);
            break;
        case 5://Find Max Min
            printf("Find Max/Min Grades\n");
            findMinMax(grades,counter);
            break;
        case 6://Calculate Average
            printf("Calculate Average\n");
            calcAverage(grades,counter);
            break;
        case 7:
            printf("Bye Bye Mr. American Pie!\n");
            break;
                
    }while(option!=7);
void addGrade(float grades[],int counter);
{
    //Calculate the number of free locations
    int number=15-counter;
    //get number of grades from user
    int numbgrade;
    //get grades
    int i;
    for(i=0;i<numbgrade;i++)
        scanf("%f",&grades[counter+numbgrade+i]);
    counter=counter+numbgrade;
}
void removeGrade(float grades[], int counter);
{
    int number;//get index number of grades
    scanf("%d",&number);
    printf("Are you sure to remove %f\n",grades[number]);
    printf("yes or no\n");
    int i;
    for(i=number;i<14;i++)
    grades[i]=grades[i+1];
    //validation of that number
    //remove grade
}
void sortGrade(float grades[],int counter);
{
    //bubble sort grades
}
void printGrade(float grades[],int counter);
{
    int x;
    for(x=0;x<15;x++);
    printf("%f %d",grades, counter);
}
void findMinMax(float grades[],int counter);
{
    //find min max in slides
}
void calcAverage(float grades[],int counter);
{
    //calculate average
}

The ones with comment sections ares the ones I will be filling the codes in. I'm trying to figure out how to write my remove function. Thank you in Advance. Note: If it is vague I will try to post the actual question from my assignment.

[grumpy]

A few observations

1) Get out of the habit of leaving main()'s return type off. Yes, compilers accept it. For people, it is bad practice for several reasons. People are more important than compilers.

2) Don't use fflush(stdin). Ever. fflush() has undefined behaviour for any input stream. There is a FAQ somewhere on this site with information about realistic alternatives.

3) At a guess, your remove function will need to shuffle array elements (e.g. if element 3 is removed, shuffle elements 4 .... to the left.).