C++读写示例

#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;
}