Compilare: user.cpp: In function ‘void Read(int&)’: user.cpp:34:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pin=0,fread(in,1,MAX,IN); ^ user.cpp:40:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pin=0,fread(in,1,MAX,IN); ^ user.cpp: In function ‘int main()’: user.cpp:140:23: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(in,1,MAX,IN); ^