Program In C++ To Calculate Simple Interest

#include<iostream.h>
#include<conio.h>

int main()
{
int p,r,t,i;
cout<<"Enter Principle : ";
cin>>p;
cout<<"Enter Rate : ";
cin>>r;
cout<<"Enter Time : ";
cin>>t;
i=(p*r*t)/100;
cout<<"Simple interest is : "<<i;

getch();
return 0;
}