String Truncated for Some Reason in C++

Question

So, I was just starting C++, and I have a problem. I declared a string variable and all that, but when I have input give the variable a value, then try to display it, it only shows the first word of the sentence.

#include <iostream>
#include <string>

using namespace std;
using std::string;

int main()
{
        string answer;
        cout << "Give me a sentence and I will repeat it!";
        cin >> answer;
        cout << answer;
        return 0;
}

For example, I entered "Yay it worked!", and it outputted "Yay"

`cin` reads input until white space is met. Use `std::getline`. — 101010, Aug 05 '14 at 23:17
`cin >> answer;` use [`std::getline(cin,answer)`](http://en.cppreference.com/w/cpp/string/basic_string/getline) instead. Know your manuals! — πάντα ῥεῖ, Aug 05 '14 at 23:17

score 3 · Answer 1 · answered Aug 05 '14 at 23:18

3

The delimiter for std::cin is whitespace, so it only took the first word of your sentence. Like @πάνταῥεῖ said, use std::getline(cin,answer) instead.

answered Aug 05 '14 at 23:18

Thank you so much! I was so confused! – Number1son100 Aug 05 '14 at 23:28

score 1 · Answer 2 · answered Aug 05 '14 at 23:19

As the comment explains, cin will only read until the first bit of whitespace is met (in your case this seems to be a space). Instead, you can use std::getline, which will read until a specified character, or a return by default:

std::string answer;
std::cout << "Give me a sentence and I will repeat it!";
std::getline(std::cin, answer):
std::cout << answer;

To make it read until a specified character would look like:

char end_char = 'a';
std::getline(std::cin, answer, end_char);

Thank you so much! I was so confused! – Number1son100 Aug 05 '14 at 23:27 — Number1son100, Aug 05 '14 at 23:27

String Truncated for Some Reason in C++

2 Answers2