Example: C Program to Find Grade of a Student Using Conditional Operator

#include <stdio.h>

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int main() {

    float subject_1, subject_2, subject_3, subject_4, subject_5;

    float total, average, percentage;

    char grade;

​

    printf("Enter the marks of five subjects::\n");

    scanf("%f%f%f%f%f", &subject_1, &subject_2, &subject_3, &subject_4, &subject_5);

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    // It will calculate the Total, Average and Percentage

    total = subject_1 + subject_2 + subject_3 + subject_4 + subject_5;

    average = total / 5.0;

    percentage = (total / 500.0) * 100;

​

    // It will calculate the Grade

    grade = average >= 90 ? 'A' : (average >= 80 && average < 90 ? 'B' : (average >= 70 && average < 80 ? 'C' : (average >= 60 && average < 70 ? 'D' : 'E')));

​

    // It will produce the final output

    printf("\nThe Total marks is:  \t%.2f / 500.00\n", total);

    printf("\nThe Average marks is:\t%.2f\n", average);

    printf("\nThe Percentage is:   \t%.2f%%\n", percentage);

    printf("\nThe Grade is:        \t'%c'\n", grade);

    return 0;

}