switch语句不一定后面都要加break

#include<stdio.h>

int main()

{

int day = 0;

scanf("%d", &day);

switch(day)

case 1:

case 2:

case 3:

case 4:

case 5:

printf("工作日\n");

case 6:

case 7:

printf("休息日\n");

default:

printf("输入错误");

break;

}