C PROGRAM You are to write a C program that will load a 2D array with values. Yo

Question

C PROGRAM
You are to write a C program that will load a 2D array with values. You can assume that the array has 4 columns. Each column will represent an exam score for a student. Each row will represent an individual student’s scores. The row subscript will become a ID for a student.

• You need to create a menu that will added 4 exam scores for a new student each time it is executed • You need a menu choice that will display the average exam scores for a student • You need a menu choice that will display the average scores by exam • You need a menu choice that will display the class average • You need a menu choice that will clear out the gradebook • You need a menu choice that will output the contents of the gradebook to a TEXT FILE • Each time the program ends the data will be saved to a binary file • Each time the programs the data will be loaded from the binary file (if exists) C PROGRAM
You are to write a C program that will load a 2D array with values. You can assume that the array has 4 columns. Each column will represent an exam score for a student. Each row will represent an individual student’s scores. The row subscript will become a ID for a student.

• You need to create a menu that will added 4 exam scores for a new student each time it is executed • You need a menu choice that will display the average exam scores for a student • You need a menu choice that will display the average scores by exam • You need a menu choice that will display the class average • You need a menu choice that will clear out the gradebook • You need a menu choice that will output the contents of the gradebook to a TEXT FILE • Each time the program ends the data will be saved to a binary file • Each time the programs the data will be loaded from the binary file (if exists)
You are to write a C program that will load a 2D array with values. You can assume that the array has 4 columns. Each column will represent an exam score for a student. Each row will represent an individual student’s scores. The row subscript will become a ID for a student.

• You need to create a menu that will added 4 exam scores for a new student each time it is executed • You need a menu choice that will display the average exam scores for a student • You need a menu choice that will display the average scores by exam • You need a menu choice that will display the class average • You need a menu choice that will clear out the gradebook • You need a menu choice that will output the contents of the gradebook to a TEXT FILE • Each time the program ends the data will be saved to a binary file • Each time the programs the data will be loaded from the binary file (if exists) You are to write a C program that will load a 2D array with values. You can assume that the array has 4 columns. Each column will represent an exam score for a student. Each row will represent an individual student’s scores. The row subscript will become a ID for a student.

• You need to create a menu that will added 4 exam scores for a new student each time it is executed • You need a menu choice that will display the average exam scores for a student • You need a menu choice that will display the average scores by exam • You need a menu choice that will display the class average • You need a menu choice that will clear out the gradebook • You need a menu choice that will output the contents of the gradebook to a TEXT FILE • Each time the program ends the data will be saved to a binary file • Each time the programs the data will be loaded from the binary file (if exists)

Explanation / Answer

#include <stdio.h>
#include <stdlib.h>
#define NUMBERofSTUDENTS 3
#define EXAMSCORES 2
int scores[NUMBERofSTUDENTS][EXAMSCORES];
void initialScores(int[NUMBERofSTUDENTS][EXAMSCORES]);
double examAverage(int[], int);
double studentAverage(int[], int);

int main()
{
    int i; //counter for for-loop
    int j; //counter for for-loop
    int NUMBERofSTUDENTSGrades; //int for total number of grades
    numOfGrades = NUMBERofSTUDENTS * EXAMSCORES;

    initialScores(scores); //seed initialScores to scan scores

    //print table DELETE LATER!
    printf("%d,%d,%d ", NUMBERofSTUDENTS, EXAMSCORES,
        numOfGrades);
    for(i = 0; i < NUMBERofSTUDENTS; i++)
    {
        for(j = 0; j < EXAMSCORES; j++)
        {
            printf("%5d", scores[i][j]);
        }
    printf(" ");
    }
    printf(" ");

    //print average for each test
    for(i=0; i < EXAMSCORES; i++)
    {
        printf("The average grade for test %d is %.2f ",
        i+1, examAverage(scores[i], NUMBERofSTUDENTS));
    }
    printf(" ");

    //each student average
    for(i=0; i < NUMBERofSTUDENTS; i++)
    {
        printf("Student %d's average is: %.2f ",
        i+1, studentAverage(scores[i], EXAMSCORES));
    }
    printf(" ");

}

void initialScores(int scores[NUMBERofSTUDENTS][EXAMSCORES])
{
    int i;
    int j;
   
    for(i=0; i < NUMBERofSTUDENTS; i++)
    {
        for(j=0; j < EXAMSCORES; j++)
        {
            scanf("%d", &scores[i][j]);
        }
    }
}

double examAverage(int column[], int students)
{
    int i; //exam counter
    int sumOfGrades = 0; //sum of a column

    for(i = 0; i < students; i++)
    {
        sumOfGrades += column[i];
    }
    return(double) sumOfGrades / students;
}

double studentAverage(int student[], int numOfGrades)
{
    int i;
    int sumStudentGrades = 0;

    for(i=0; i < numOfGrades; i++)
    {
        sumStudentGrades += student[i];
    }
    return(double) sumStudentGrades / numOfGrades;
}

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