7.01-打开文件进行读写操作.cpp

Visual C++的课件

#include <fstream.h>
int main()
{
	char fileName[80];
	char buffer[255];    // for user input
	cout << "File name: ";
	cin >> fileName;

	ofstream fout(fileName);  // open for writing
	fout << "This line written directly to the file...\n";
	cout << "Enter text for the file: ";
	cin.ignore(1,'\n');  // eat the newline after the file name
	cin.getline(buffer,255);  // get the user's input
	fout << buffer << "\n";   // and write it to the file
	fout.close();             // close the file, ready for reopen

	ifstream fin(fileName);    // reopen for reading
	cout << "Here's the contents of the file:\n";
	char ch;
	while (fin.get(ch))
		cout << ch;

	cout << "\n***End of file contents.***\n";

	fin.close();            // always pays to be tidy
	return 0;
}