Compilare: main.cpp: In function 'void read(int&)': main.cpp:22:64: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pdim == dim) fread(buff, 1, dim, stdin), pdim = 0; ^ main.cpp:25:64: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pdim == dim) fread(buff, 1, dim, stdin), pdim = 0; ^ main.cpp: In function 'int main()': main.cpp:77:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pandemie.in", "r", stdin); ^ main.cpp:78:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pandemie.out", "w", stdout); ^