Compilare: user.cpp:39:29: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] myifstream fin ("sortnet.in"); ^ user.cpp: In member function ‘void myifstream::advance()’: user.cpp:16:43: 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:24:39: 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); ^