(string Concatenation) Write a program that separately inputs a first name and a last name and concatenates the two into a new string.

What will be an ideal response?

```
// Program reads a first name and last name and concatenates the two.
#include
#include
using namespace std;

int main()
{
// declare two strings
string first;
string last;

cout << "Enter first name: ";
cin >> first;

cout << "Enter last name: ";
cin >> last;

// use function append to insert space and string last
first.append( " " ).append( last );
cout << "The full name is: " << first << endl;
} // end main
```
Enter first name: John
Enter last name: Green
The full name is: John Green