Use istream_iterator to read various data types


#include <iostream>
#include <iterator>
#include <string>
#include <vector>
using namespace std;

int main()
{
  int i;
  double d;
  string str;
  vector<int> vi;
  vector<double> vd;
  vector<string> vs;
 
  cout << "Enter some integers, enter 0 to stop.";
  istream_iterator<int> int_itr(cin);
  do {
    i = *int_itr; 
    if(i != 0) {
      vi.push_back(i);  
      ++int_itr; 
    }
  } while (i != 0); 

  cout << "Enter some doubles, enter 0 to stop.";
  istream_iterator<double> double_itr(cin);
  do {
    d = *double_itr; 
    if(d != 0.0) {
      vd.push_back(d); 
      ++double_itr; 
    }
  } while (d != 0.0); 

  cout << "Enter some strings, enter 'quit' to stop.";
  istream_iterator<string> string_itr(cin);
  do {
    str = *string_itr; 
    if(str != "quit") {
      vs.push_back(str); 
      ++string_itr;
    }
  } while (str != "quit"); 

  cout << "Here is what you entered:\n";
  for(i = 0; i <vi.size(); i++)
    cout << vi[ i ] << " ";
  cout << endl;

  for(i = 0; i <vd.size(); i++)
    cout << vd[ i ] << " ";
  cout << endl;

  for(i = 0; i <vs.size(); i++)
    cout << vs[ i ] << " ";

  return 0;
}

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Use istream_iterator to read various data types : Vector « Data Structure « C++

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