Complete the following program skeleton by writing a switch statement that displays "one" if the user has entered 1, "two" if the user has entered 2, and "three" if the user has entered 3. If a number other than 1, 2, or 3 is entered, the program should display an error message.

#include
Using namespace std;
Int main()
{
Int Usrnum;
cout << "Enter one of the number 1,2 or 3:";
cin>> userNum;
// Write the switch statement here.
return 0;