编写程序,将来自文件中的行保存在一个vector,然后使用一个istringstream 从vector中读取数据,每次读一个单词

#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;
}

  

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