下面的C++代码将用户输入的信息写入到afile.dat，然后再通过程序读取出来输出到屏幕

#include <fstream>  #include <iostream>  using namespace std;      int main ()  {            char data[100];        // open a file in write mode.     ofstream outfile;     outfile.open("afile.dat");        cout << "Writing to the file" << endl;     cout << "Enter your name: ";     cin.getline(data, 100);        // write inputted data into the file.     outfile << data << endl;        cout << "Enter your age: ";     cin >> data;     cin.ignore();           // again write inputted data into the file.     outfile << data << endl;        // close the opened file.     outfile.close();        // open a file in read mode.     ifstream infile;     infile.open("afile.dat");         cout << "Reading from the file" << endl;     infile >> data;        // write the data at the screen.     cout << data << endl;           // again read the data from the file and display it.     infile >> data;     cout << data << endl;        // close the opened file.     infile.close();        return 0;  }

程序编译执行后输出如下结果

$./a.out  Writing to the file  Enter your name: Zara  Enter your age: 9  Reading from the file  Zara  9