同步读写文本 代码(C++)

本文地址: http://blog.csdn.net/caroline_wendy

写程序: 每个2秒写入文本一个数字;

读程序: 每个5秒读入文本最后一个数字;

写程序代码:

#include <iostream>
#include <fstream>

#include <windows.h>

using namespace std;

int main (void) {

	ofstream ofs("D:/w.txt");
	int num = 0;
	while (1) {
		ofs << ++num << std::endl;
		std::cout  << num << std::endl;
		Sleep(2000);
	}

	ofs.close();

	return 0;
}

读程序代码:

/*
 * main.cpp
 *
 *  Created on: 2014.06.08
 *      Author: Spike
 */

/*vs 2012*/

#include <windows.h>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main()
{
	vector<string> tmp_files;

	while (1) {
		Sleep(5000);
		ifstream infile( "D:/w.txt" );
		if (!infile) {
			cout << "fail!" << endl;
			return 0;
		}

		string lineContent;
		while ( getline( infile, lineContent, ‘\n‘ ) ){
			tmp_files.push_back(lineContent);
		}
		infile.close();

		std::cout << *(tmp_files.end()-1) << std::endl;
	}

	/*ofstream outfile( "w2.txt",ios::out );
	vector<string>::iterator siter = tmp_files.begin();

	copy( tmp_files.begin(), tmp_files.end()-1, ostream_iterator<string>(outfile) );
	cout << "ok!" << endl;
	outfile.close();*/

	return 0;
}