## C program to calculate total average and percentage of five subjects

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.

#### Required knowledge

Operators, Data Types in c, Variables in C, Basic input/output

#### Logic to find total, average and percentage

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

• 1.Input marks of five subjects. Store it in some variables say eng, phy, chem, math and comp.

• 2.Calculate sum of all subjects and store in total = eng + phy + chem + math + comp.

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

• 4.Calculate percentage using percentage = (average / 500) * 100.

• 5.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
```
```
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```