#include <stdio.h>

int main()?

{?

? ? int sum; //這里改成int sum; ?結果就出錯了 求解??????

int month=8;

? ? switch(month)

? ? {

case 12:sum+=30;

case 11:sum+=31;

case 10:sum+=30;

case 9:sum+=31;

case 8:sum+=31;

case 7:sum+=30;

case 6:sum+=31;

case 5:sum+=30;

case 4:sum+=31;

break;

}

printf("%d\n",sum);

return 0;

}