Program to find Simple Interest.

 Simple Interest= (Principal*Rate*Time)/100

#include<stdio.h>

#include<conio.h> 

void main()

{

int p, r, t, S.I;

clrscr();

printf("Enter principal, rate and time:");

scanf("%d%d%d", &p, &r, &t);

S.I= (p*r*t)/100;

printf("Simple Interest= %d", S.I);

}

Here, I have not inclued getch() function, which holds the output screen. to see the output screen, press alt+F5.