Student mark sheet program in C

In this post, you will learn how to calculate the total marks and grade of a student in the C programming language using structures.

Structure in C is a user-defined data type that enables us to store a collection of different data types. The struct keyword is used to define the structure. No memory or storage space is allocated when a struct type is specified. We need to define variables in order to allocate memory of a specific structure type and operate with it.

The given C program manually allows a user to enter student details, i.e., name, rollno, and marks for three subjects, and then calculate the percentage of the student based on the marks of those three subjects, and then calculate the grade using this range.

80 or above A grade
60 or above B grade
45 or above C grade
35 or above D grade
Less than 35 Fail

In this program, we used the if else statements. If else conditions, check for a mark for a particular grade, and if it is true, then print the grade and omit all the other conditions.

#include<stdio.h>

void main ()
{
    int rollno; 
    char name[30]; 
	float sub1,sub2,sub3;
	float per,avg;
	float total;
	
	printf("\nEnter the Student Roll Number : ");
	scanf("%d", &rollno);
    printf("\nEnter the Student Name : "); 
    scanf("%s", &name);
	printf("Enter the marks of sub1 : ");
	scanf("%f", &sub1);
	printf("Enter the marks of sub2 : ");
	scanf("%f", &sub2);
	printf("Enter the marks of sub3 : ");
	scanf("%f", &sub3);
	total= sub1+sub2+sub3;
	printf("\nThe total mark : %.2f ",total);
	per = (total/300)*100;
	avg = (total/3);
	printf("\nThe percentage mark : %.2f ", per);
	printf("\nThe average mark : %.2f", avg);
	
	// Grade calculation 
	if(per>=80) 
	printf("\nGrade : A");
	else if(per>=60) printf("\nGrade : B");
	else if(per>=45) printf("\nGrade : C");
	else if(per>=35) printf("\nGrade : D");
	else if(per<35) printf("\nFail ");
}

Enter the Student Roll Number : 101
Enter the Student Name : PriskaKashyap
Enter the marks of sub1 : 89
Enter the marks of sub2 : 91
Enter the marks of sub3 : 79
The total mark : 259.00 
The percentage mark : 86.33 
The average mark : 86.33
Grade : A

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