print cpp file code example

Example 1: print contents of cpp file

#include <iostream>
#include <fstream>

int main()
{
    std::ifstream f("file.txt");

    if (f.is_open())
        std::cout << f.rdbuf();
}

Example 2: how to open an input file in c++

#include <fstream>

ifstream file_variable; //ifstream is for input from plain text files
file_variable.open("input.txt"); //open input.txt

file_variable.close(); //close the file stream
/*
Manually closing a stream is only necessary
if you want to re-use the same stream variable for a different
file, or want to switch from input to output on the same file.
*/
_____________________________________________________
//You can also use cin if you have tables like so:
while (cin >> name >> value)// you can also use the file stream instead of this
{
 cout << name << value << endl;
}
_____________________________________________________
//ifstream file_variable; //ifstream is for input from plain text files
ofstream out_file;
out_file.open("output.txt");

out_file << "Write this scentence in the file" << endl;