Assignment

assignment.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

const int MAXLENGTH = 100; // Max length of the string

int numOfStudents = 2;
int numberOfSubjects = 2;

// Calculate the sum, average of each subject
void calculateTotalAndAverage(int studentMarks[numOfStudents][numberOfSubjects], char subjectTitles[numberOfSubjects][MAXLENGTH])
{
    int classTotal = 0;

    for (int i = 0; i < numberOfSubjects; i++)
    {
        // Calculating the total for each subject
        int total = 0;

        for (int j = 0; j < numOfStudents; j++)
        {
            total = total + studentMarks[j][i];
        }

        // add the subject total to class total
        classTotal = classTotal + total;

        // Printing results
        printf("Sum of the marks for %s is %i\n", subjectTitles[i], total);
        printf("Average of the marks for %s is %f\n", subjectTitles[i], total / (float)numOfStudents);
        printf("\n");
    }

    float average = classTotal / (float)(numberOfSubjects * numOfStudents);
    printf("Average of the class is : %f\n", average);
}

void calculateRank(char studentNames[numOfStudents][MAXLENGTH], int studentMarks[numOfStudents][numberOfSubjects])
{
    int studentTotals[numOfStudents];
    // Calculating the sum of each student

    for (int i = 0; i < numOfStudents; i++)
    {
        int studentTotal = 0;

        for (int j = 0; j < numberOfSubjects; j++)
        {
            studentTotal = studentTotal + studentMarks[i][j];
        }

        // printf("Total for %s is %i\n", studentNames[i], studentTotal);
        studentTotals[i] = studentTotal;
    }

    for (int i = 0; i < numOfStudents - 1; i++)
    {
        // Last i elements are already in place
        for (int j = 0; j < numOfStudents - i - 1; j++)
        {
            // Sorting the arrays (Bubble sort)
            if (studentTotals[j] < studentTotals[j + 1])
            {
                // Swapping rank
                int temp = studentTotals[j];
                studentTotals[j] = studentTotals[j + 1];
                studentTotals[j + 1] = temp;

                // Swapping name
                char *tempName = (char *)malloc((strlen(studentNames[j]) + 1) * sizeof(char));
                strcpy(tempName, studentNames[j]);
                strcpy(studentNames[j], studentNames[j + 1]);
                strcpy(studentNames[j + 1], tempName);
                free(tempName);
            }
        }
    }

    // The header
    printf("RANK\tNAME\t\tTOTAL\n");

    for (int i = 0; i < numOfStudents; i++)
    {
        // Printing ranks
        printf("%i\t%s\t\t%i\n", i + 1, studentNames[i], studentTotals[i]);
    }
}

int main()
{
    // contains the name of students
    char studentNames[numOfStudents][MAXLENGTH];

    // contains the marks of each student
    int studentMarks[numOfStudents][numberOfSubjects];
    
    // contains the name of subjects
    char subjectTitles[numberOfSubjects][MAXLENGTH];

    printf("\n---------------------------------------------\n");

    for (int i = 0; i < numberOfSubjects; i++) {
        printf("Enter the name of subject %i: ", i + 1);
        scanf("%s", subjectTitles[i]);
    }

    printf("\n---------------------------------------------\n");

    for (int i = 0; i < numOfStudents; i++)
    {
        int marks[numberOfSubjects];

        printf("Enter student name: ");
        scanf("%s", studentNames[i]);

        for (int j = 0; j < numberOfSubjects; j++)
        {
            printf("Enter Marks for %s: ", subjectTitles[j]);
            scanf("%i", &studentMarks[i][j]);
        }

        printf("\n---------------------------------------------\n");
    }

    calculateTotalAndAverage(studentMarks, subjectTitles);

    printf("\n---------------------------------------------\n");
    calculateRank(studentNames, studentMarks);

    return 0;
}