cpp03.cpp

C++参考书

// Coded by plusir -- Jan.09.2003.
// Standard C++ Bible -- (P530-19-3)

#include <fstream>
using namespace std ;

int main()
{
	cout << "Opening file..." << endl ;
	ofstream outFile( "test.txt", ios::noreplace ) ;

	if ( outFile.fail() ) {

		cout << endl ;
		cout << "File already exists!" << endl ;
		cout << "Delete it( y/n )? " ;

		char ch ;
		cin >> ch ;

		if ( ( ch == 'Y' ) || ( ch == 'y' ) ) {
			ofstream outFile( "test.txt" ) ;
			outFile << "These are test data" ;
			outFile << ", and these are more" ;
			cout << "New file created." << endl ;
		}
		else
			cout << "File not opened." << endl ;
	}

	return 0 ;
}