program the following by using c language

Ask User to select one option from the following. Calculate area of Circle [c] Calculate area of Rectangle [r] Calculate area of Triangle [t]

If user enters c then ask user to enter radius and calculate area using following formula.

If user enters r then ask user to enter length & width and calculate area using following formula.

If user enters t then ask user to enter base & height and area using following formula.

Display the area.