Modify the C++ program that you entered in Practice Program. In this version calculate the...

Modify the C++ program that you entered in Practice Program. In this version calculate the total length of fence you would need to enclose a rectangular area that is width feet long and height feet tall. The program should have variables for width and height with values entered by the user. Create another variable, totalLength, that stores the total length of fence needed (which your program should calculate). Output the total with an appropriate message.

Using your text editor, enter (that is, type in) the C++ program shown in Display 1.8. Be certain to type the first line exactly as shown in Display 1.8. In particular, be sure that the first line begins at the left-hand end of the line with no space before or after the # symbol. Compile and run the program. If the compiler gives you an error message, correct the program and recompile the program. Do this until the compiler gives no error mes-sages. Then run your program.

Display: A Sample C++ Program