Eroare de compilare: user.cpp: In member function ‘bool cmp::operator()(const int&, const int&)’: user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int comp(int, int)’: user.cpp:40: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:82: error: ‘strlen’ was not declared in this scope user.cpp:115: warning: comparison between signed and unsigned integer expressions user.cpp:71: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:72: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:73: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:79: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:91: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:108: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result