Write a C program to input marks of five subjects of a student and calculate total, average and percentage of all subjects. How to calculate total, average and percentage in C programming. Logic to find total, average and percentage in C program.

**Example**

**Input**

Enter marks of five subjects: 95 76 85 90 89

**Output**

Total = 435 Average = 87 Percentage = 87.00

## Required knowledge

Arithmetic operators, Variables and expressions, Data types, Basic input/output

## Logic to find total, average and percentage

Step by step descriptive logic to find total, average and percentage.

- Input marks of five subjects. Store it in some variables say
`eng`,`phy`,`chem`,`math`and`comp`. - Calculate sum of all subjects and store in
`total = eng + phy + chem + math + comp`

. - Divide sum of all subjects by total number of subject to find average i.e.
`average = total / 5`

. - Calculate percentage using
`percentage = (total / 500) * 100`

. - Finally, print resultant values
`total`,`average`and`percentage`.

## Program to find total, average and percentage

```
/**
* C program to calculate total, average and percentage of five subjects
*/
#include <stdio.h>
int main()
{
float eng, phy, chem, math, comp;
float total, average, percentage;
/* Input marks of all five subjects */
printf("Enter marks of five subjects: \n");
scanf("%f%f%f%f%f", &eng, &phy, &chem, &math, &comp);
/* Calculate total, average and percentage */
total = eng + phy + chem + math + comp;
average = total / 5.0;
percentage = (total / 500.0) * 100;
/* Print all results */
printf("Total marks = %.2f\n", total);
printf("Average marks = %.2f\n", average);
printf("Percentage = %.2f", percentage);
return 0;
}
```

**Important note:** Always use meaningful variable names. Use of variable name such as `n1`, `num1`, `a` is not recommended.

Output

Enter marks of five subjects: 95 76 85 90 89 Total marks = 435.00 Average marks = 87.00 Percentage = 87.00

Happy coding 😉

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