Compilare: user.cpp:65:28: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] myIfstream cin ( "arb4.in" ) ; ^ user.cpp: In member function ‘void myIfstream::advance()’: user.cpp:43:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, 1, SIZE, input); ^ user.cpp: In constructor ‘myIfstream::myIfstream(char*)’: user.cpp:51:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, 1, SIZE, input); ^