C++中如何同步讀寫文本

寫程式: 每個2秒寫入文本一個數字;

讀程式: 每個5秒讀入文本最後一個數字;

寫程式碼:

#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;  }

輸出:

更多精彩內容：http://www.bianceng.cnhttp://www.bianceng.cn/Programming/cplus/

讀程式碼:

/*  * 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;  }

輸出:

作者：csdn部落格 Spike_King