C studing NO.8 switch

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>


int main()
{
  int d = 0;
  scanf("%d", &d);
  switch (d)
  {
  default:
    printf("输入错误\n");
    break;
  case 1:
    printf("星期一\n");
    break;
  case 2:
    printf("星期2\n");
    break;
  case 3:
    printf("星期3\n");
    break;
  case 4:
    printf("星期4\n");
    break;
  case 5:
    printf("星期5\n");
    break;
  }
  return 0;