Compilare: user.cpp: In member function ‘void instream::advance()’: user.cpp:39:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^ user.cpp: In constructor ‘instream::instream(const char*)’: user.cpp:13:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^ user.cpp: In function ‘int main()’: user.cpp:91:21: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] rem[i]=l-(k[i]/2); ^