Question

Goal: Use cin, perform a basic mathematical operation, and display the result using stream manipulation.

Assignment: Write a program to calculate the area of a circle. The program will use the following formula:

$A=r^2$

Where:

$A$ is the area of the circle $($in square meters$)$;

$r$ is the radius of the circle $($in meters$).$

Assume $$ is equal to $3\mathrm{.}14.$

The program should prompt the user to enter the radius of the circle in meters. It will then calculate and display the

to two decimal places. Ensure the number is not shown in scientific notation.

Sample run $($user input between :

Enter the radius of the circle $(m)$:

The area of the circle is: $78\mathrm{.}50$ square meters

Note: You will need to write A complete C$++$ program, comprehensive of any inclusion preprocessor directives, nam

and the main function with its return. Use the sample run to determine which messages to display to the user.