Question

1. Write a C program that calculates the average grade for a specified number of students from each student's termtest and final grade. The program must first ask the user how many students there are. Then, for each student, the program will ask the user for the termtest grade (grade #1) and final grade (grade #2). The program should be able to handle up to 100 students, each with 2 grades (termtest and final). Use a two dimensional float array to store the grades. Then, using a loop, prompt the user for the termtest and final grade of each student. Create a second single-dimensional float array to hold the average grade for each student (for up to 100 students). To calculate the average grade, pass both the two dimensional array and the single dimensional array to a function named void calculateAverages(float grades[][2], float averages[], int numStudents). The third parameter of the function indicates the actual number of students. The function will then use a loop to calculate the average grade for each student. Remember, since averages is an array parameter, any changes to averages is changing the original array. When the function returns to main, the program (in main) should display the average grade for each student (using a loop).
   
   Example output:
   How many students are there? 3
   Please enter grade #1 for student #1: 80
   Please enter grade #2 for student #1: 60
   Please enter grade #1 for student #2: 90
   Please enter grade #2 for student #2: 60
   Please enter grade #1 for student #3: 70
   Please enter grade #2 for student #3: 74
   The average grade for student #1 is 70
   The average grade for student #2 is 75
   The average grade for student #3 is 72

Answer 1

CODE -

#include<stdio.h>

void calculateAverages(float grades[][2], float averages[], int numStudents)

{

    for(int i=0; i<numStudents; i++)

    {

        averages[i] = (grades[i][0] + grades[i][1]) / 2;            // Calculating average grades for different students using for loop

    }

}

int main()

{

    int numStudents;

    printf("How many students are there? ");

    scanf("%d", &numStudents);                                      // Taking no. of students as input from the user

    // Creating arrays

    float grades[100][2];

    float averages[100];

    // Loop to take grades as input from the user

    for(int i=0; i<numStudents; i++)

    {

        printf("Please enter grade #1 for student #%d: ", i+1);

        scanf("%f", &grades[i][0]);

        printf("Please enter grade #2 for student #%d: ", i+1);

        scanf("%f", &grades[i][1]);

    }

    calculateAverages(grades, averages, numStudents);               // Calling function to calculate average grades

    for(int i=0; i<numStudents; i++)

        printf("The average grade for student #%d is %.2f\n", i+1, averages[i]);        // Displaying average grades

    return 0;

}

SCREENSHOT -

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