cin std::string with spaces

Question

I want to read an std::string named destination from std::cin until a given delimiter. By default, std::istream::operator<< interrupts after a space when I do destination << std::cin. If destination were a char[], I could use std::getline.

What do we use for std::string?

[std::getline](http://en.cppreference.com/w/cpp/string/basic_string/getline) — Yksisarvinen, May 16 '18 at 10:02
Its nut a duplicate @Tas!!!!! I want to cin a std::string not char[] and I have mentioned that!!!! — Eduard Rostomyan, May 16 '18 at 10:04
Sorry I wasn't clear enough when I said _read all the answers_. If you scroll down just a little further beneath the accepted answer, you should find [an answer there that helps you](https://stackoverflow.com/a/5838803/4143855) — Tas, May 16 '18 at 10:06
@EduardRostomyan That's why he suggested to read all of the answers. Use `std::getline`. It's not the same as `std::cin::getline`. — Algirdas Preidžius, May 16 '18 at 10:06

score 6 · Accepted Answer · edited May 16 '18 at 10:31

Your premise is wrong: std::getline does work with std::string:

template< class CharT, class Traits, class Allocator >
std::basic_istream<CharT,Traits>& getline( std::basic_istream<CharT,Traits>& input,
                                           std::basic_string<CharT,Traits,Allocator>& str,
                                           CharT delim );

This means you can read from std::cin to an std::string until a given delimiter:

std::string destination;
std::getline(std::cin, destination, '|');

('|' taken as an exemple delimiter)

Note: you should check getline's return before reading from destination. getline returns a reference to std::cin which can be converted to a bool whose value is true if the stream is in a correct state:

if (std::getline(std::cin, destination, '|') == false) {
    // error handling
}

score 0 · Answer 2 · answered May 16 '18 at 10:02

0

Use std::getline, like this:

std::string InputWithSpaces;
std::getline (std::cin,InputWithSpaces);
std::cout << InputWithSpaces << std::endl; //test 1 2 3

answered May 16 '18 at 10:02

Alexey Usachov

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cin std::string with spaces

2 Answers2