C语言宏函数

#include <stdio.h>
#define ICALL(x) if((err=x())<0) goto out
int test();
int main()
{
 int err=0;
 ICALL(test);
 out:
 printf("the result is out\n");
 printf("the result is out2\n");
 out2:
 printf("the result is out3");
}
int test()
{
 return -1;
}