flushing input buffer using cin

[kuhns_m]

I am having a problem if someone inputs a sentence with spaces in it.
Here is some code:

const int MAXNAME = 20; // maximum no. of characters in name
const int MAXADDR = 30; // maximum no. of characters in address

struct Node
{ 
  char strName[MAXNAME];
  char strAddress[MAXADDR];
  int age;
  Node* link;
};
typedef Node* Node_Ptr;


void main()
{
  
	Node temp_ptr;
	char choice;
	
	cout << "Would you like to enter a record?(y/n)" << endl;
	cin  >> choice;
		
	cin.clear();

	cout << "Enter Name: (lastname,firstname)" << endl;
	//cin  >> temp_ptr.strName;
	cin.getline(temp_ptr.strName, MAXNAME);

	cout << "Enter Age: " << endl;
	cin  >> temp_ptr.age;

	cout << "Enter Address: " << endl;
	cin  >> temp_ptr.strAddress;
	
	return;
}

If I use cin >> temp_ptr.strName I only get the string to the first blank space. If I use cin.getline(temp_ptr.strName, 20); the execution doesn't stop. Like there's something in the buffer, but I clear the cin before I as for the name. The endl will flush the output buffer after the cout.
I know I could read the data in seperately(breaking at white spaces), but know I'm curious.
Thanks in advance