In C$++$ Please

Program Objective:

You are tasked with creating a test of a dayNumber function.

You are not writing the dayNumber function, only coding the test of this function

Read the pre and post conditions for testDayNumber in functions.h

Implement testDayNumber

You may choose to implement dayNumber, however, please do not submit your version of dayNumber

functions.h listed below:

$//$Precondition: not any

$//$Postcondition: If the input string date is a non$-$empty string in the format of m$/$d$/$y where m$,$ d$,$ and y where

$//$ non$-$negative integers the function returns a number from $1$ to $366$; the number of days from the beginning of the year,

$//$ where January $1$st returns $1$ and December $31$st returns either $365$ or $366$ depending on the year.

$//$ Returns $0$ when the provided input string is not a valid date. By the given format, any year greater than $0$ is valid.

unsigned short dayNumber$($const char date$[])$;

$//$Precondition: not any

$//$Postconditon: Returns $0$ if all test cases for dayNumber passes. Otherwise, returns a number greater than $0,$ where

$//$ the number correlates to the first test case that failed. This function is NOT chatty.

unsigned short testDayNumber$()$;

Starter Code listed below:

#include "functions.h$"$

unsigned short testDayNumber$()\{$

if $($dayNumber$("1/1/1")!=1)//$Valid date of January $1$st$,$ should return $1,$ no matter what the year is

return $1$;

$//$TODO: Add more tests

return $0$; $//$All tests passed

$\}$