Question

How to copy a text file into another in C++

Answer 1

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

using std::cout;
using std::endl;

int main()
{
	std::ifstream ifs("d:\\data.txt");
	std::ofstream ofs("d:\\data.bak");
	std::string text = "";

	for (int i = 0; ifs.eof() != true; i++) 
		text += ifs.get();

	text.erase(text.end() - 1);     

	ifs.close();

	ofs << text;
	ofs.close();

	return 0;
}

/*
run:

data.txt
--------
c c++
c# java php python

data.bak
--------
c c++
c# java php python

*/

 

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Answer 2

#include <iostream>
#include <fstream>

using std::cout;
using std::endl;

int main()
{
	std::ifstream ifs("d:\\data.txt");
	std::ofstream ofs("d:\\data.bak");

	char ch;
	ifs.unsetf(std::ios::skipws);  
	while (!ifs.eof()) {
		ifs >> ch;
		if (!ifs.eof()) {
			ofs << ch;
		}
	}

	ifs.close();
	ofs.close();

	return 0;
}

/*
run:

data.txt
--------
c c++
c# java php python

data.bak
--------
c c++
c# java php python

*/

 

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