C++ program to find out the raise to power using recursion

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

int fun(int,int);

int main()
{
    system("cls");

    int a,b,res;

    std::cout<<"Enter the base of number = ";
    std::cin>>a;
    std::cout<<"Enter the power of base = ";
    std::cin>>b;

    res = fun(a,b);

    std::cout<<"The raise to power is = "<<res;

    getch();
    return 0;
}

fun(int a, int b)
{
    int res;

    if(b==0)
    {
        return(1);
        exit(0);
    }
    else
    {
        res = a*fun(a,(b-1));
        return(res);
    }
}

Enter the base o number = 4
Enter the power of base = 5
The raise to power is = 1024