finding power of a number without using power function

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

void main()
{
  int base,expo,i,sum=1;
  cout<<"Enter base and exponent of the expression :";
  cin>>base>>expo;
  // determining the power function
     for(i=0;i<expo;i++)
       sum*=base;
   cout<<"\nAnswer of (Base ^ exponent) :"<<sum;
  //ends here
  getch();
}

Output