RSA Encryption on C++

#include <iostream>
using namespace std;

int main(){
int a,b,c,d,e,z=1;
cout<<"Value:";
cin>>a;
cout<<"degree:";
cin>>b;
cout<<"mod x:";
cin>>c;

for (int i=1;i<=b;i++){
z=z*a;
}

cout<<(z%c);
}