Compilare: user.cpp: In function ‘int main()’: user.cpp:81:12: warning: unused variable ‘memorie’ [-Wunused-variable] double memorie; ^ user.cpp:83:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("boom.out", "w", stdout); ^ user.cpp: In member function ‘void myIfstream::advance()’: user.cpp:27:47: 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(const char*)’: user.cpp:34:43: 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); ^