C Program to Calculate Average and Percentage Marks

In this article, you will learn and get code about how to create a program that finds averages and percentage marks. The last program given here is the complete version of finding the average and percentage marks of a student. In that program, the number of subjects and maximum marks are also decided by the user.

Find the average marks in C

The question is, "Write a program in C that asks the user to enter marks obtained in five subjects and prints the average mark as output." So the answer to this question is given below:

#include<stdio.h>
#include<conio.h>
int main()
{
    int i;
    float mark, sum=0, avg;
    printf("Enter Marks obtained in 5 Subjects: ");
    for(i=0; i<5; i++)
    {
        scanf("%f", &mark);
        sum = sum+mark;
    }
    avg = sum/5;
    printf("\nAverage Mark = %0.2f", avg);
    getch();
    return 0;
}

This program was compiled and executed in the Code::Blocks IDE. This is the first snapshot of the sample run:

c program average percentage marks

Now supply the marks obtained in 5 subjects as input, say 76, 87, 98, 70, and 82, and press the ENTER key to see the average mark of the student as shown in the second snapshot of the sample run given below:

average mark program c

Steps used in previous program

Here are some of the main steps used in the above program:

Find the percentage mark in C

The question is: write a program in C that asks the user to enter marks obtained in five subjects (out of 100) and finds the percentage of marks obtained by the student. The answer to this question is given below:

To calculate the percentage marks of a student in C programming, you have to ask the user to enter marks obtained in some number of subjects, say 5. Put the sum of 5 marks in a variable called sum, and the sum/5 in a variable called avg. Simply print "avg" as the result on the output.

#include<stdio.h>
#include<conio.h>
int main()
{
    int i;
    float mark, sum=0, perc;
    printf("Enter Marks obtained in 5 Subjects (Out of 100): ");
    for(i=0; i<5; i++)
    {
        scanf("%f", &mark);
        sum = sum+mark;
    }
    perc = (sum/500)*100;
    printf("\nPercentage Mark = %0.2f%c", perc, 37);
    getch();
    return 0;
}

This program will produce the output as shown in the snapshot given below:

percentage mark program c

Most of the code written in this program is almost the same as the previous program except that we used the %c format specifier with 37 as its value. Because the %c format specifier is used to print characters and the ASCII value of the % character is 37, So to print the % sign on the output screen after the percentage value, we have used its ASCII value as shown in the above output.

Calculate the Average and Percentage Mark in C

The question is: write a program in C that asks the user to enter marks obtained and finds the average and percentage mark value. Here the subject count and the maximum marks must be entered by the user. The answer to this question is given below.

This is the complete version of the calculating average and percentage marks program in C. Here, the number of subjects and maximum mark are decided by the user. Let's have a look at it:

#include<stdio.h>
#include<conio.h>
int main()
{
    int i, n, max;
    float mark, sum=0, avg, perc;
    printf("How many Subject runs in your Institute ? ");
    scanf("%d", &n);
    printf("\nEnter Maximum Mark of Subject: ");
    scanf("%d", &max);
    printf("\nEnter Marks obtained in %d Subjects (Out of %d): ", n, max);
    for(i=0; i<n; i++)
    {
        scanf("%f", &mark);
        sum = sum+mark;
    }
    avg = sum/n;
    perc = (sum/(n*max))*100;
    printf("\nAverage Mark = %0.2f", avg);
    printf("\nPercentage Mark = %0.2f%c", perc, 37);
    getch();
    return 0;
}

The snapshot given below shows the initial output of this program:

average percentage mark program c

And the snapshot given below shows the final output of this program after supplying the total number of subject runs in the institute, maximum marks, and marks obtained in all subjects.

c average percentage mark

Let's look at the above program (and its output) through the lens of the following example:

The same program in different languages

C Quiz


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