用C ++打开文件

Question

I am trying to open a file stored on my c drive with name test.txt .I am getting a lot of errors.I am new to filing in C++.Please help me out thanks. // writing on a text file

#include <iostream>
#include <fstream>
using namespace std; 
int main ()
 {
    ofstream mystream;
    mystream.open("C:\\test",ios::in||ios::out);
        /*Check if the file is opened properly*/
    return 0;
}

Answer 1

This

mystream.open("C:\\test",ios::in || ios::out);

should be

mystream.open("C:\\test",ios::in | ios::out);

Answer 2

You are using the logical OR operator ( || ) instead of the bitwise OR operator ( | ). The former returns a boolean value, while the latter returns the bitwise OR of the two values.

Answer 3

You probably also want to fully qualify the filename. For example:

mystream.open("C:\\test.txt", ios::in | ios::out);