Compilare: main.cpp: In function 'void read(int&)': main.cpp:13:61: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++poz == DIM) fread(buff, 1, DIM, stdin), poz = 0; ^ main.cpp:17:61: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++poz == DIM) fread(buff, 1, DIM, stdin), poz = 0; ^ main.cpp: In function 'int main()': main.cpp:51:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.in", "r", stdin); ^ main.cpp:52:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tsunami.out", "w", stdout); ^