Question

How to read text file backwards in C++

Answer 1

#include <iostream>
#include <fstream>

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

int main()
{
	ifstream ifs("d:\\data.txt");

	if (!ifs) {
		cout << "Error open file" << endl;
		return 1;
	}

	char ch;
	long size;
	ifs.seekg(0, std::ios::end);
	size = (long)ifs.tellg(); 
	size--;

	for (int i = size; i >= 0; i--) {
		ifs.seekg(i, std::ios::beg);
		ifs.get(ch);
		cout << ch;
	}
	cout << endl;

	ifs.close();

	return 0;
}


/*
run:

nohtyp ++c c

*/

 

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