c. Write program that declares Class awarded for a given percentage of marks, 

where mark 70% = Distinction. Read percentage from standard input.

Program:

#include<stdio.h>

#include<conio.h>

void main()

{

int phy, chem, bio, math, comp; 

float per;

clrscr();

printf("Enter five subjects marks: ");

scanf("%d%d%d%d%d", &phy, &chem, &bio, &math, &comp);

per = (phy + chem + bio + math + comp) / 5.0;

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

if(per >= 70)

{

printf("Distinction");

}

else if(per <=40 )

{

printf("Failed");

}

else if(per <= 60 && per>40)

{

printf("Second Class");

}

else if(per <= 70 && per>60)

{

printf("First Class");

}

getch();

}

Output: