gcc支持的标签

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#include <stdio.h>

#include <time.h>

int main(/*int argc, char const *argv[]*/)

{

    void
* target;

    time_t
now = time(NULL);

    if(now & 1)

        target = &&odd;

    else

        target = &&even;

    goto
*target;

odd:

    printf("now is odd second: %ld,NULL=%d\n", now,NULL);

    return
0;

even:

    printf("now is even second: %ld,NULL=%d\n", now,NULL);

    return
0;

}