Eroare de compilare: user.cpp: In member function ‘bool cmp::operator()(const int&, const int&)’: user.cpp:21: 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:81: error: ‘strlen’ was not declared in this scope user.cpp:112: warning: comparison between signed and unsigned integer expressions user.cpp:70: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result 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 ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:75: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:78: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:90: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result