Working with Constants, Variables and Arithmetic Operators

Exercise $1$: Bring in the file circlearea.cpp from the Lab $2$ folder.

The code of circlearea.cpp is as follows:

$//$ This program will output the circumference and area

$//$ of the circle with a given radius.

$//$ PLACE YOUR NAME HERE

#include

using namespace std;

const double PI $=3\mathrm{.}14$;

const double RADIUS $=5\mathrm{.}4$;

int main$()$

$\{$

area $//$ definition of area of circle

float circumference; $//$ definition of circumference

circumference $=2*$ PI $*$ RADIUS; $//$ computes circumference

area $=$ ; $//$ computes area

$//$ Fill in the code for the cout statement that will output $($with description$)$

$//$ the circumference

$//$ Fill in the code for the cout statement that will output $($with description$)$

$//$ the area of the circle

return $0$;

$\}$

$21$