c++存储和读取数据到txt文件中

#include<fstream>
#include<iostream>
using namespace std;
int main()
{
	ofstream out("D://wang//test.txt");//写数据到指定目标文件夹，这个文件夹里可以没有test.txt文件，
	if(out.is_open())
	{
		out<<"this is a line.\n";
		out<<"This is another lien.\n";
		out.close();
	}
	//从test.txt中读取数据
	char buffer[256];
	ifstream in("D://wang//test.txt");
	if (!in.is_open())
	{
		cout<<"Error opening file";
	}
	while (!in.eof())
	{
		in.getline(buffer,100);
		cout<<buffer<<endl;
	}
	return 0;