Eroare de 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: error: ‘strlen’ was not declared in this scope 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