C program for " if the marks obtained by a student in five different subject are input through the keyboard, find out the aggregate marks and percentage obtained by the student. Assume that the maximum that can be obtained by a student in each subject is 100. Also determine the grade he got."

Problem: C program for " if the marks obtained by a student in five different subject are input through the keyboard, find out the aggregate marks and percentage obtained by the student. Assume that the maximum that can be obtained by a student in each subject is 100. Also determine the grade he got."

Grade system: 

A : if the percentage scored is more than 90.

B : if the percentage scored is in between 81 to 90.

C : if the percentage scored is in between 71 to 80.

D : if the percentage scored is in between 61 to 70.

E : if the percentage scored is in between 51 to 60.

F : if the percentage scored is in between 41 to 50.

fail : if the percentage scored is less than 40.

Formulae used:

Aggregate marks = sub1 + sub2 + sub3 + sub4 + sub5

Average marks = aggregate marks / 5

Percentage = ( aggregate marks x 100 ) / 500

C program:

// Program by shyam kanth

#include<stdio.h>

int main(){

    int sub1, sub2, sub3, sub4, sub5, sum;

    float per;

    printf("Enter the marks of five subjects : ");

    scanf(" %d %d %d %d %d",&sub1,&sub2,&sub3,&sub4,&sub5);

    sum=sub1+sub2+sub3+sub4+sub5;

    per = (sum*100)/500;

    printf("Total marks obtained : %d\n",sum);

    printf("Percentage scored : %.2f\n",per);

    if(per>90){

        printf("Student has passed with grade A.");

    }else if(per>=81 && per<=90){

        printf("Student has passed with grade B.");

    }else if(per>=71 && per<=80){

        printf("Student has passed with grade C.");

    }else if(per>=61 && per<=70){

        printf("Student has passed with grade D.");

    }else if(per>=51 && per<=60){

        printf("Student has passed with grade E.");

    }else if(per>=41 && per<=50){

        printf("Student has passed with grade F.");

    }else{

        printf("Student has failed.");

    }

    return 0;

}

Codes used:

• #include <stdio.h> : Header file for input output
• int : integer data type
• float : Decimal data type
• sub1, suv2, sub3, sub4, sub5, sum, per : Variables used
• printf : Function for displaying message
• scanf : Function for taking input
• if : Conditional statement
• else : execute when if statement is false
• else if : if-else ladder

Do comment, if any doubt

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