2. a room has one door and two windows, and it needs to be painted. assume that 1 gallon of paint can paint 120 square feet; that the door is 8ft x 5ft and the windows are each 2ft x 3ft. (you will not paint the door or windows.) write a program called lab 1-2b to ask the user for the length, width & height of the room; then calculate 1) total square footage of walls to be painted and the 2) amount of paint needed. then print both values with labels. c#

// code in C#.

using System;

class WallPaint {

 static void Main()

 {

 //variables

     double l,w,h;

     double win_area,door_area;

     double amount_gallon;

     Console.WriteLine("enter length of room:");

     // read the length of room

    l= Convert.ToDouble(Console.ReadLine());

    Console.WriteLine("enter width of room:");

    // read the width of room

    w= Convert.ToDouble(Console.ReadLine());

    Console.WriteLine("enter height of room:");

    // read the height of room

    h= Convert.ToDouble(Console.ReadLine());

    Console.WriteLine("enter amount of a gallon:");

    // read the amount of a gallon

    amount_gallon= Convert.ToDouble(Console.ReadLine());

    // find the area of both window

     win_area=2*(2*3);

     // area of door

     door_area=8*5;

     // total area of all walls

     double tot_room_area=2*(l*h)+2*(w*h);

     // area to be painted

     double paint_area=tot_room_area-(win_area+door_area);

     // gallos of paint required

     double no_gallon=paint_area/120;

     // total amount of paint

     double tot_amount=no_gallon*amount_gallon;

     // print the area to be painted

     Console.WriteLine("total square footage of walls to be painted : "+paint_area);

     // print amount of paint

     Console.WriteLine("total amount of paint is: "+tot_amount);

 }

}

Explanation:

Read the length, width and height of the room from user.Read the amount of paint  per gallon from user.Calculate the total area of all the walls.Calculate the area or window and door.Then find the area to be painted by subtracting window and door  area from total wall area.Then find the number of gallon of paint required to paint  all the area.Then calculate the total amount of the paint.

Output:

enter length of room:                                                                                                      

10                                                                                                                        

enter width of room:                                                                                                      

8                                                                                                                          

enter height of room:                                                                                                      

12                                                                                                                        

enter amount of a gallon:                                                                                                  

15                                                                                                                        

total square footage of walls to be painted : 380                                                                          

total amount of paint is: 47.5

in software engineering and computer science, abstraction is: the process of removing physical, the way that different data types interact, is the beginning of abstraction.