为什么有时候cin.getline() 不能用而cin.get()可以用啊

Question

第一个cin.get 就可以试用 但是换成 cin.getline 就会报错 .
这个是为什么ya

using namespace sstd;
cout << "what year was your house built?\n";
    int year;
    cin >> year;
    cin.get();
    cout << "what is its street address?\n";
    char address[99999];
    cin.getline(address, 99999);
    cout << "Year built :" << year << endl;
    cout << "Address :" << address << endl;
    cout << "Done!";

Answer 1

不带参数的get，返回值是int，返回单个的字符的ascii
带参数的get，返回的是流
address是字符串，用 getline 装入字符数组缓冲区