Write a complete program that will have a main function and a function called twice.  a. Write a function named twice whose only parameter is an integer pointer. b. This function doubles the value stored at the location pointed by the pointer parameter. c. In the main method, declare an integer variable num and initialize it to 5. Call the function twice from main such that the function twice will double the value of num. d. In the main method and after calling the function, print the variable

7. Please help me answer this engineering question

For Assignment 5, you will design and write a program that covers the following topics: Functions, Vectors, Structures, and Classes. Functions & Passing Variables: Write a different function for each type of variable used. The functions should provide some sort of output through a cout or return value. Normal variable: Passing a variable by value to a paramater of a function. Show that this only makes a copy of the variable passed to it. Normal variable with a default value:  Set a default value for a function parameter. Show how the default value gets used. Reference variable: Passing a variable by reference to a parameter of a function. Show how a reference variable can change the value of variable in main(). Show how the use of const can make a reference variable safer (think of it in terms of read/write). Pointer variable: Passing an address of a variable to a parameter of a function. Show how a pointer can change the value of a variable in main(). Show…

Declare an integer pointer variable intPointer. Initialize it to point to an int variablenamed someInt.Assign the value 451 to someInt and output (cout) the variable someInt and output (cout)the value pointed to by intPointer.Write an assignment statement that indirectly stores 900 into the value pointed to by intPointer.Output (cout) the value pointed to by intPointer and output (cout) the variable someInt,