why cin is skipped in C++?

Question

I have a simple question but any one makes me known. below there is simple code.

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

int main(){
 string ans;
 while(true){
  cin >> ans;
  cout << "ans : " << ans << endl;
 }
}

I type usa canada england island and enter !!

It shows result below

usa canada england island

ans : usa

ans : canada

ans : england

ans : island

hello world

ans : hello

ans : world

Why does it skip second cin ?? How does it work in stream buffer?

Please answer my question thank you

Is your question "I enter multiple words, separated by spaces and `cin` is skipped for all those words entered? Are you expecting it to print "usa canada england island" first, then "hello world". You should clarify your question, it's a little difficult to read. — Tas, Dec 13 '18 at 05:28
Possible duplicate of [Program skips second cin](https://stackoverflow.com/questions/19390059/program-skips-second-cin) — Tas, Dec 13 '18 at 05:47

score 0 · Answer 1 · answered Dec 13 '18 at 05:58

0

I think you might want to use std::getline if your goal is to output the all the inputs they entered rather than each item being seperated.

int main(){
  string ans;
  while(true){
    getline(cin, ans);
    cout << "ans : " << ans << endl;
  }
}

answered Dec 13 '18 at 05:58

donpsabance

358
3
9

why cin is skipped in C++?

1 Answers1