Compilare: user.cpp: In function ‘bool vecini(int, int, int, int)’: user.cpp:21: warning: unused variable ‘ok1’ user.cpp: In function ‘int main()’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp:48: warning: comparison between signed and unsigned integer expressions user.cpp:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:41: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result /tmp/ccUCmtA3.o: In function `main': user.cpp:(.text+0x174): warning: the `gets' function is dangerous and should not be used.