Compilare: main.cpp: In function 'void cit(int&)': main.cpp:23:53: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pz == dim) fread(ax,1, dim, stdin),pz = 0; ^ main.cpp:27:51: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pz == dim) fread(ax,1,dim,stdin),pz = 0; ^ main.cpp: In function 'int main()': main.cpp:89:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("easychoice.in", "r", stdin); ^