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

C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter6: Modularity Using Functions
Section6.3: Returning Multiple Value
Problem 5E
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1) 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 num.

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