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C++

//code a program for the following the given Instruction.

Geometry Calculator

1. Calculate the Area of a Circle

2. Calculate the Area of a Rectangle

3. Calculate the Area of a Triangle

4. Quit

Enter your choice (1-4):

If the user enters 1, the program should ask for the radius of the circle and then display its area. Use 3.14159 for pi.

#03 If the user enters 2, the program should ask for the length and width of the rectangle, and then display the rectangle's area.

#04 If the user enters 3, the program should ask for the length of the triangle's base and its height, and then display its area.

#05 If the user enters 4, the program should end.

#06 Input validation: Accept only values 1-4 for the menu and only positive values for the other user inputs.

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