fig14_04.cpp

来自「这是C＋＋编程经典的书上实例的源代码。 （英文名是《C＋＋ how to pr」· C++ 代码 · 共 59 行

// Fig. 14.4: fig14_04.cpp
// Create a sequential file
#include <iostream>

using std::cout;
using std::cin;
using std::ios;
using std::cerr;
using std::endl;

#include <fstream>

using std::ofstream;

#include <cstdlib>  

int main()
{
   // ofstream constructor opens file
   ofstream outClientFile( "clients.dat", ios::out ); 

   if ( !outClientFile ) {  // overloaded ! operator
      cerr << "File could not be opened" << endl;
      exit( 1 );    // prototype in cstdlib
   }

   cout << "Enter the account, name, and balance.\n"
        << "Enter end-of-file to end input.\n? ";

   int account;
   char name[ 30 ];
   double balance;

   while ( cin >> account >> name >> balance ) {
      outClientFile << account << ' ' << name
                    << ' ' << balance << '\n';
      cout << "? ";
   }

   return 0;  // ofstream destructor closes file
}



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