Ofstream new_file new_file.open(“new_file.txt”, ios::out | ios::app ) We can combine the different modes using or symbol |. Here we use out mode that allows us to open the file to write in it. So we create new_file object and call open() function. In the above example, new_file is an object of type fstream, as we know fstream is a class so we need to create an object of this class to use its member functions. Opens the file only if it does not already exist Opens the file and moves the control to the end of the file Opens the file and appends all the outputs at the end Opens the file to write(default for ofstream) Opens the file to read(default for ifstream) The following modes are used as per the requirements. The second argument represents the mode in which the file has to be opened. Here, the first argument of the open function defines the name and format of the file with the address of the file. Syntax void open(const char* file_name,ios::openmode mode) First is bypassing the file name in constructor at the time of object creation. We can open a file using any one of the following methods:ġ. Generally, the first operation performed on an object of one of these classes is to associate it to a real file. Moving on with article on File Handling in C++ Opening a File
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