Write a c program to input marks of five subjects physics chemistry biology mathematics and computer

In this article, you will learn how to find the Total, Average, Percentage, and Grade values of the marks of five subjects in the c language.

Table of Contents Show

Standard Formula
Explanation

Example

Enter the marks of five subjects:: 95 85 74 64

The Total marks are: 371.00 / 500.00

The Average marks are: 74.20

The Percentage is: 74.20%

The Grade is: 'C'

You should have the knowledge of the following topics in c programming to understand this program:

C Functions
C main() function
C printf() function

Standard Formula

Total = marks1 + marks2 + marks3 + marks4 + marks5

Average = Total / 5.0

Percentage = (Total / 500.0) x 100

Where marks1, marks2, marks3, marks4, and marks5 are the marks of five subjects.

In this article, we solve this problem in five methods:

// C Program to Find Grade of a Student Using If else Ladder #include <stdio.h> 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); // 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 if (average >= 90) grade = 'A'; else if (average >= 80 && average < 90) grade = 'B'; else if (average >= 70 && average < 80) grade = 'C'; else if (average >= 60 && average < 70) grade = 'D'; else grade = '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; }

Run Program

Output

Enter the marks of five subjects:: 95 85 74 64

The Total marks is: 371.00 / 500.00

The Average marks is: 74.20

The Percentage is: 74.20%

The Grade is: 'C'

Explanation

Average: we take the marks of five subjects as input after that the sum of these marks is divided by 5 then It will return the average value of the marks.

Percentage: we made a division of the sum of the user's marks by 500 and then multiplied by 100 then It will return the percentage value of the marks.

Grade: we compared the value of the Average marks with this range of marks to find the Grade of students like:

If Average marks >= 90 then Its Grade is 'A'

If Average marks >= 80 and < 90 then Its Grade is 'B'

If Average marks >= 70 and < 80 then Its Grade is 'C'

If Average marks >= 60 and < 70 then Its Grade is 'D'

If Average marks < 60 then Its Grade is 'E'

// C Program to Find Grade of a Student Using Switch Case #include <stdio.h> int main() { float subject_1, subject_2, subject_3, subject_4, subject_5; float total, average, percentage; char grade; int sAvg; printf("Enter the marks of five subjects::\n"); scanf("%f%f%f%f%f", &subject_1, &subject_2, &subject_3, &subject_4, &subject_5); // 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 divides average by 10 check switch expression sAvg = (int) average / 10; // It will calculate the Grade switch (sAvg) { case 10: grade = 'A'; break; case 9: grade = 'A'; break; case 8: grade = 'B'; break; case 7: grade = 'C'; break; case 6: grade = 'D'; break; default: grade = 'E'; break; } // 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; }

Run Program

Output

Enter the marks of five subjects:: 98 88 76 66

The Total marks is: 393.00 / 500.00

The Average marks is: 78.60

The Percentage is: 78.60%

The Grade is: 'C'

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// C Program to Find Grade of a Student Using Function #include <stdio.h> // @Custom function to Display Percentage & Grade void CalcPercentGrade(float subject_1, float subject_2, float subject_3, float subject_4, float subject_5) { float total, average, percentage; char grade; // 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 if (average >= 90) grade = 'A'; else if (average >= 80 && average < 90) grade = 'B'; else if (average >= 70 && average < 80) grade = 'C'; else if (average >= 60 && average < 70) grade = 'D'; else grade = 'E'; // It will display final calculation 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); } // @Driver function to Run this Program int main() { float subject_1, subject_2, subject_3, subject_4, subject_5; printf("Enter the marks of five subjects::\n"); scanf("%f%f%f%f%f", &subject_1, &subject_2, &subject_3, &subject_4, &subject_5); // It will produce the final output CalcPercentGrade(subject_1, subject_2, subject_3, subject_4, subject_5); return 0; }

Run Program

// C Program to Find Grade of a Student Using Nested If else #include <stdio.h> 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); // 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 if (average >= 90) { grade = 'A'; } else { if (average >= 80 && average < 90) { grade = 'B'; } else { if (average >= 70 && average < 80) { grade = 'C'; } else { if (average >= 60 && average < 70) { grade = 'D'; } else { grade = '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; }

Run Program

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// C Program to Find Grade of a Student Using Conditional Operator #include <stdio.h> 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); // 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; }

Run Program