Compilare: user.cpp: In function ‘int main()’: user.cpp:75:32: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] myIfstream fin ("hawaii.in"); ^ user.cpp:76:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("hawaii.out", "w", stdout); ^ user.cpp: In constructor ‘myIfstream::myIfstream(char*)’: user.cpp:27:39: 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); ^ user.cpp: In member function ‘void myIfstream::advance()’: user.cpp:19:43: 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); ^