Program to find simple interest for a an amount

//Simple interest

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int p,n,r,si;

cout<<"Enter Principal Amount:";

cin>>p;

cout<<"Enter Number of years:";

cin>>n;

cout<<"Enter Rate of Interest:";

cin>>r;

si=p*n*r/100;

cout<<"Simple interest="<<si;

getch();

}