'Why doesn't work correctly when I put a space between United and States words? [duplicate]

If statement isn't working when I change "UnitedStates" as "United States". What is the reason of that? Why space character cannot be read correctly? What should I do? If you could help me to understand, I'd be grateful.

int main()
{
    string u1 = "UnitedStates";
    string a1;
    cout << "Country: ";
    cin >> a1;
    if (a1 == u1)
        cout << "Congrats!";

        return 0;
}

int main()
{
    string u1 = "United States";
    string a1;
    cout << "Country: ";
    cin >> a1;
    if (a1 == u1)
        cout << "Congrats!";

        return 0;
}

I tried so many times.

c++string


Solution 1:[1]

The input operator works by reading in one string a time and a space character indicates the string ends. So a1 will be "United" in this case.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 yo1nk

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