Compilare: main.cpp: In function 'void Init(const char*)': main.cpp:6:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen (x , "r" , stdin); ^ main.cpp: In function 'void nextc()': main.cpp:14:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread (buff , 1 , BUFF , stdin); ^