pow

打开pow的正确姿势
x=pow((long double)n,m);
或
y=round(pow(n,m));

#include
#include
#include
#include
#include
using namespace std;
int n,m;
long long x,y;
int main(){
    freopen("data.txt","r",stdin);
    freopen("1.txt","w",stdout);
    scanf("%d%d",&n,&m);
    x=pow((long double)n,m);
    y=round(pow(n,m));
    cout<' '<'\n';
}