调试手段

#define debug(format, ...) fprintf (stderr, format, ## __VA_ARGS__)

main()
{
    char *p ="it is:"
    debug("%s %d", p, num);
    return 0;
}


可以利用__FILE__, __FUNCTION__, __LINE__, __TIME__ , __DATE__ 调用调试。

int main(int argc, char **argv)
{
    printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);
    funca();
    printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);
    funcb();
    printf("%s(%d)-%s: this is main\n",__FILE__,__LINE__,__FUNCTION__);
    return 0;
}


#ifdef _DEBUG
/* Print trace message */
  #define TRACE \
    fprintf (stderr, "%s: %s(): line %d\n", __FILE__, __FUNCTION__, __LINE__)
  #define TRACE1(s) \
    fprintf (stderr, "[%s: %s (): line %d] %s\n", __FILE__, __FUNCTION__, __LINE__, (s))
  #define TRACEI(d) \
    fprintf (stderr, "[%s: %s (): line %d] %d\n", __FILE__, __FUNCTION__, __LINE__, (d))
  #define TRACEN(x,ARGS...) \
    fprintf (stderr, "[%s: %s (): line %d] "x, __FILE__, __FUNCTION__, __LINE__, ##ARGS)
#else/* no trace */
  #define TRACE
  #define TRACE1(s)
  #define TRACEI(d)
  #define TRACEN(x,ARGS...)
#endif