Compilare: user.cpp: In function ‘int main()’: user.cpp:36:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("proc2.in", "r", stdin); ^ user.cpp:37:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("proc2.out", "w", stdout); ^ user.cpp: In function ‘char GetChar()’: user.cpp:14:43: warning: ignoring return value of ‘size_t fread_unlocked(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread_unlocked(buff, 1, BUFFSIZE, stdin); ^