Due at the end of lab.

For this lab you will be modifying the Calculator program from Chapter 4 of the text. A version of the code will be posted on the course schedule. Note that this calculator program is not the same as the one from previous assignments - it uses a series of functions.

• Fix the minor, but annoying, problem that when the user exits, the program reprints the last answer.
• Currently, the program just prints the answer to each of the user's problems. Change the output so that the program prints the whole problem as a mathematical expression. For example, if the user asks for the sum of 4.5 and 1.3, the program currently prints:
  answer = 5.8
  change it to print something like:
  4.5 + 1.3 = 5.8
• Add a subtraction operation to the calculator.
• Add an operation that calculates the surface area of a right circular cylinder. This calculation should be performed in a separate function, not in the main() function.
• Add an operation that calculates the volume of a right circular cylinder. This calculation should be performed in a separate function, not in the main() function.
• Add an operation that calculates the surface area of a right circular cone. This calculation should be performed in a separate function, not in the main() function.
• As always, add a comment block to the beginning of the program with your name, section number, date, and the lab number.