Compilare: user.cpp: In function ‘char getChar()’: user.cpp:66:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf1, 1, BUF_SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:90:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.in", "r", stdin); ^ user.cpp:91:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate.out", "w", stdout); ^ user.cpp: In function ‘int bs(int, int, int)’: user.cpp:56:10: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^