Compilare: user.cpp: In function ‘void buf(int&)’: user.cpp:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void rezolva()’: user.cpp:87: warning: unused variable ‘ceva_j’ user.cpp: In function ‘int main()’: user.cpp:111: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result