C ++读取实际输入行

Question

I am trying to get a string line from input. For example "This is great". In all cases I am getting either or "This" either " great". getline() method did not working as expected. Code tried:

string val;

while (true) {
    cout << message;
    getline(cin, val);
    if (val.length() <= length)
    {
        break;
    }
}

My target is to get all sentence. Is that possible?

Answer 1

adding cin.clear(); cin.sync(); cin.clear(); cin.sync(); solve the problem

string val;

while (true) {
    cin.clear();
    cin.sync();
    cout << message;
    getline(cin, val);
    if (val.length() <= length)
    {
        break;
    }
}