c++求幂次方

比如说求x的y次方

#include<stdio.h>
//#include"1442.h"
int main(){
	//int x = f1();
	int x=2,y=10,ans=x;
	y--;
	while(y!=0){
		if(y%2!=0){
			ans = ans * x;
		}
		y /= 2;
		x = x*x;
	}
	printf("%d\n",ans);
	while(true);
	return 0;
}