$//$ Chapter $6,$ Programming Challenge $2$

#include

using namespace std;

$//$ Write the prototypes for the getLength,

$//$ getWidth, getArea, and displayData

$//$ functions here.

int main$()$

$\{$

double length, $//$ The rectangle's length

width, $//$ The rectangle's width

area; $//$ The rectangle's area

$//$ Get the rectangle's length.

length $=$ getLength$()$;

$//$ Get the rectangle's width.

width $=$ getWidth$()$;

$//$ Get the rectangle's area.

area $=$ getArea$($length$,$ width$)$;

$//$ Display the rectangle's data.

displayData$($length$,$ width, area$)$;

return $0$;

$\}$

$//***************************************************$

$//$ You must write the getLength, getWidth, getArea, $*$

$//$ and displayData functions. $*$

$//***************************************************$

fill in the necessary code to crate the function