IN C# Write a program that calculates and displays the area of a shape.

$$ In function main, the user is prompted to choose for which

$$ shape $($circle$,$ square or triangle$)$ the area will be calculated.

$$ Based on the user's shape selection, the program will call one of

$$ three functions $($circle$,$ square or triangle$)$ and the user is

$$ then prompted for input of relevant dimensions.

$$ For example, if circle is selected, the circle function is

$$ called and the user is prompted for radius input. $$

$$ The area calculation and dimensions input should be handled by whichever

$$ of the three functions is called: circle, square or triangle.

$$

$$ The general template is given below, along with hints in the comments. $$

$-----------------------------------------------------------------------*/$

#include...

float circle$()$;

float square$()$;

float triangle$()$;

int main$()$

$\{$

$$

$$ return $0$;

$\}$

$/*-------------------------------------------------------------------$

$$ FUNCTION: circle$()$

$$ PURPOSE:

$$ PARAMETERS:

$$ RETURNS:

$------------------------------------------------------------------------*/$

float circle$()$

$\{$

$//1.$ create a variable for radius

$//2.$ prompt for radius as user input

$//3.$ save radius to the variable

$$ return $...//4.$ calculate and return area as $3\mathrm{.}14*$ R $*$ R $($or whatever you named your radius variable$)$

$\}$

$/*-------------------------------------------------------------------$

$$ FUNCTION: square$()$

$$ PURPOSE:

$$ PARAMETERS:

$$ RETURNS:

$------------------------------------------------------------------------*/$

float square$()$

$\{$

$//$ follow the same plan as for circle, but prompt for side instead

$//$ of radius and return area calculated as side $*$ side

$$ return $...$

$\}$

$/*-------------------------------------------------------------------$

$$ FUNCTION: triangle$()$

$$ PURPOSE:

$$ PARAMETERS:

$$ RETURNS:

$------------------------------------------------------------------------*/$

float triangle$()$

$\{$

$//$ area $=0\mathrm{.}5*$ base $*$ height, so you will need to prompt for

$//$ two variablas as user input and save each in a separate

$//$ variable you already created

$$ return $...$

$\}$