#include double factorial(int n) { double rt=1; int i; for ( i=1;ivoid main() { int n; scanf("%d",&n); printf("%.0lf\n",factorial(n)); }
回答2：
#include using namespace std; int factorail(int n) { int mul = 1; for(int i = 1; i <= n ; i ++) { mul *= i; } return mul; } int main() { int n; cout<<"please input n :"; cin>>n; cout< return 0; }
