Below is a simple example of a C program to create a student marksheet. This program takes input for the student’s name, roll number, and marks in three subjects, and then calculates the total marks and percentage. Program : #include<stdio.h>#include<conio.h>int main(){int a,b,c,d,e,total;float average;printf(“Enter the Marks of First Subject : “);scanf(“%d”,&a);printf(“Enter the Marks of Second Subject : “);scanf(“%d”,&b);printf(“Enter the Marks of Third Subject : “);scanf(“%d”,&c);printf(“Enter the Marks of Fourth Subject : “);scanf(“%d”,&d);printf(“Enter the Marks of Fifth Subject : “);scanf(“%d”,&e);total=a+b+c+d+e;printf(“Total marks of the Student : %d/500”,total);average=total/5;printf(“\nAverage : %f\n”,average);if((average>=90)&&(average<=100)){printf(“Grade = A++”);}else if((average>=85)&&(average<=89)){printf(“Grade = A+”);}else if((average>=80)&&(average<=84)){printf(“Grade = A”);}else if((average>=75)&&(average<=79)){printf(“Grade = B+”);}else if((average>=70)&&(average<=74)){printf(“Grade = B”);}else if((average>=65)&&(average<=69)){printf(“Grade = C+”);}else if((average>=60)&&(average<=64)){printf(“Grade = C”);}else if((average>=55)&&(average<=59)){printf(“Grade = D+”);}else if((average>=50)&&(average<=54)){printf(“Grade = D”);}else if((average>=45)&&(average<=49)){printf(“Grade = E+”);}else if((average>=30)&&(average<=44)){printf(“Grade = E”);}else {printf(“Grade = Fail”);}return 0;} Output :