#include <stdio.h> int main(){   printf("including\n");#include "18_include.h"#define  test_missing_nl   printf("done\n"); #define  INC   "18_include.h" #ifdef __has_include#if defined __has_include#if __has_include("18_include.h")   printf("has_include\n");#endif#if __has_include(INC)   printf("has_include\n");#endif#if __has_include("not_found_18_include.h")   printf("has_include not found\n");#endif#endif#endif #ifdef __has_include_next#if defined __has_include_next#if __has_include_next("18_include.h")   printf("has_include_next\n");#endif#if __has_include_next(INC)   printf("has_include_next\n");#endif#if __has_include_next("not_found_18_include.h")   printf("has_include_next not found\n");#endif#endif#endif #include "18_include2.h"#include "./18_include2.h"#include "../tests2/18_include2.h"    return 0;} /* vim: set expandtab ts=4 sw=3 sts=3 tw=80 :*/