file create open write close in c++ code example

Example 1: file reading c++

int a, b;
    
ifstream bd; 
myfile.open("file.txt");

if (myfile.is_open())
	while (bd >> a >> b)
    	cout << a << b << endl;

else cout << "ERROR";

Example 2: write to file in C++

ofstream myfile;
myfile.open("file.txt");

myfile << "write this to file"