in C++

Exercise 5 In main ask the user to enter two numbers (of double data type) and then ask the user to enter one of the following arithmetic operators: +, -, *,1. Depending on the operator entered call the corresponding function, e.g., if + is entered call function myAddition that adds the two numbers entered and returns their sum. Create corresponding functions for all four operators that return their result to main. If the user enters a character other than the four arithmetic operators print Invalid entry and keep asking the user until a valid operator is entered Exercise 6 Ask user to enter two numbers. Use a pointer to point to the first number. Using a pointer add 5 to the first number. Now, point the pointer to the second number and change second number's value -using a pointer- to 30. Add the two numbers and print the result. In addition, print the address of the first number, the address of the second number, the value of the pointer (the address it points to), and the address of the pointer variable