HOJ "#include nested too deeply"问题

HOJ服务器拒绝服务了，问题类似于上一篇帖子：搞挂你的C++编译器中的第一种情况，就是include的层数太深了，导致ccl死在那里了。

#include __FILE__
#include __FILE__

#ifndef MAIN
#define MAIN
int main()
{
        printf("fuck: %d\n", __INCLUDE_LEVEL__);
        return 0;
}
#endif

#gcc t.c
......
2.c:1:18: #include nested too deeply
2.c:2:18: #include nested too deeply
In file included from 2.c:2,
                 from 2.c:1,
                 from 2.c:2,
......

解决的方法就是利用gcc内建的宏__INCLUDE_LEVEL__来判断是否超过了一定的阈值，超过了阈值就不再处理了。

#ifdef INCLUDE_LEVEL_LIMIT
#undef INCLUDE_LEVEL_LIMIT
#define INCLUDE_LEVEL_LIMIT 10
#endif

#ifdef INCLUDE_LEVEL_OVERFLOW
#undef INCLUDE_LEVEL_OVERFLOW
#define INCLUDE_LEVEL_OVERFLOW 1
#endif

#if __INCLUDE_LEVEL__ < INCLUDE_LEVEL_LIMIT
#define INCLUDE_LEVEL_OVERFLOW 1
#else
#define INCLUDE_LEVEL_OVERFLOW 0
#error "#include Too Deeply"
#endif

#if INCLUDE_LEVEL_OVERFLOW==1A
//添加原先的程序代码......
#endif

#gcc t.c
t.c:15:2: #error "#include Too Deeply"