Compound Interest in c++

#include<iostream>
#include<math.h>
#include<conio.h>
using namespace std;
int main()
{
        double p, t, r, A, CI;
        cout<<"Enter Principal Amount, Time and Rate\n";
        cin>>p>>t>>r;
        A=p*pow((1+(r/100)),t);
        CI=A-p;
        cout<<"Compound Interest : "<<CI;
        getch();
        return 0;
}

Output