#include<fstream>

#include <vector>

#include<string>

#include<iostream>

#include <sstream>

#include <stdexcept>

using namespace std;

/*istream & f(istream&in){

	string v;

	while (in>>v,!in.eof())

	{

		if (in.bad())

			throw runtime_error("IO流错误");

		if (in.fail()){

			cerr << "数据错误，请重试" << endl;

			in.clear();

			in.ignore(100, '\0');

			continue;

		}

		cout << v << endl;

	}

	in.clear();

	return in;

}*/

int main()

{

	ifstream in("data.txt");

	if (!in){

		cerr << "无法打开文件" << endl;

		return -1;

	}

	string line;

	vector<string>words;

	while (getline(in, line))

		words.push_back(line);

	in.close();

	vector<string>::const_iterator it = words.begin();

	while (it != words.end()){

		istringstream line_str(*it);

		string word;

		while (line_str >> word)

			cout << word << " ";

		cout << endl;

		++it;

	}

	system("pause");

	return 0;

}