递归：求x的y次幂

#include <iostream>
using namespace std;
double dg(int x,int y)
{
	if(y==0) return 1;
	else return x*dg(x,y-1);
 } 

int main()
{
	int x;
	int y;
	cout<<"请输入x和y"<<endl;
	cin>>x;
	cout<<endl;
	cin>>y;
	cout<<endl<<dg(x,y);
}