How can I copy a text file into another? [duplicate]

Question

How can I copy a text file into another? I tried this:

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream infile("input.txt");
    ofstream outfile("output.txt");
    outfile << infile;

    return 0;
}

This just ends up leaving the following value in output.txt: 0x28fe78.

What am I doing wrong?

Answer 1

You can save the content of the input file in a string and print the string into the output file. Try this:

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

int main ()
{
    ifstream infile("input.txt");
    ofstream outfile("output.txt");
    string content = "";
    int i;

    for(i=0; !infile.eof(); i++)     // get content of infile
        content += infile.get();
    infile.close();

    content.erase(content.end()-1);  //  last read character is invalid, erase it
    i--;

    cout << i << " characters read...\n";

    outfile << content;              // output
    outfile.close();
    return 0;
}