给出数n的阶乘

#include<stdio.h>

int main() {
  int n = 0;
  int sum = 1;
  printf("请输入一个正整数：");
  scanf_s("%d", &n);
  for (int i = 1; i < n+1; i++) {
    sum = i * sum;
  }
  printf("%d的阶乘是：%d", n, sum);
  return 0;
}