#include<iostream>
void main()
{
    int month=1;
        char *season=NULL;
        switch(month){
        case 12:
            season="winter";
                break;
        case 1:
            season="winter";
            break;
        case 2:
            season="winter";
            break;
        case 3:
        case 4:
        case 5:
            season="spring";
            break;
        case 6:
        case 7:
        case 8:
            season="summer";
            break;
        case 9:
        case 10:
        case 11:
            season="autumn";
            break;
        default:
                season="bogus month";
        }
            printf("april is in the  " ,season);

}

printf("april is in the  " ,season);这句就没有输出啊，%s！！！