C++PrimerPlus(第6版)中文版:Chapter17.4文件输入和输出

这个程序就是新建一个文件，输入文件的内容，然后又打印出来到屏幕上。

// fileio.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//
 
#include 
#include 
#include 
 
 
int main()
{
   // std::cout << "Hello World!\n";
	using namespace std;
	string filename;
 
	cout << "Enter your name for new file: ";
	cin >> filename;
 
	ofstream fout(filename.c_str());
	fout << "For your eyes only!\n";//write to file
	cout << "Enter your secret number: ";//write to screen
	float secret;
	cin >> secret;
	fout << "Your secret number is " << secret << endl;
	fout.close();//close file
	//create inpust stream object for new file and call it fin
	ifstream fin(filename.c_str());
	cout << "Here are the content of " << filename << ":\n";
	char ch;
	while (fin.get(ch))
	{
		cout << ch;
	}
	cout << "Done\n";
	fin.close();
	return 0;
 
 
}