Eroare de compilare: user.cpp: In function ‘void df(int)’: user.cpp:16: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:31: error: ‘m’ was not declared in this scope user.cpp:39: error: ‘a’ was not declared in this scope user.cpp:39: error: ‘b’ was not declared in this scope user.cpp:27: warning: unused variable ‘fiu’ user.cpp:27: warning: unused variable ‘nrf’ user.cpp:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result