Write a function that returns a binary string from an octal number. The function header is as follows: string octal2Binary(const int& octalNumber) Write a test program that prompts the user to enter...

Write a function that returns a binary string from an octal number. The function header is as follows:

string octal2Binary(const int& octalNumber)

Write a test program that prompts the user to enter an octal number, uses octal- 2Binary function to parse it into an equivalent binary string and displays the binary string.