Use C-Style strings, Pointers, string functions, iterators to do the following:

-Write a function that will take a "double" as a parameter. The function output the number, formatting it in the following way:

-If the number is negative, it will preface the number with a minus '-' sign

-If the number is a decimal with no digits to the left of the decimal point, it will include a '0' to the left of the decimal point

-The number will be shown with 4 digits to the right of the decimal point. Pad with zeros if necessare. For example: 4 -> 4.0000

-Commas will be place on the left side of the decimal point in their appropriate place. For example: 1,234,567.0000

-Write a main function that will prompt the user for a number then call the display function.