In the documentation, it is said the code to open a file is: "open(name_of_file, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR)"
When I compile, there are problems with "S_IWUSR" and "S_IRUSR". It is said they are undeclared. what are they? Where can I found a list of these flags? There is no problem with "O_RDWR" and "O_CREAT" but thre is also no documentation about them.
