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import java.util.Scanner; public class Paint1 { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); double wallHeight = 0.0; double wallWidth = 0.0; double wallArea = 0.0; double gallonsPaintNeeded = 0.0; double cansPaintNeeded = 0.0; final double squareFeetPerGallons = 350.0; // Implement a do-while loop to ensure input is valid // Prompt user to input wall's height do{ System.out.println("Enter wall height (feet): "); wallHeight = scnr.nextDouble(); }while(wallHeight<=0); // Implement a do-while loop to ensure input is valid // Prompt user to input wall's width do{ System.out.println("Enter wall width (feet): "); wallWidth = scnr.nextDouble(); }while(wallWidth<=0); // Calculate and output wall area wallArea = wallHeight * wallWidth; System.out.println("Wall area: "+wallArea+" square feet"); // Calculate and output the amount of paint (in gallons) needed to paint the wall gallonsPaintNeeded = wallArea/squareFeetPerGallons; System.out.println("Paint needed: " + gallonsPaintNeeded + " gallons"); //Only lines 33 and 34 have been added and the rest of the code is untouched. //We use Math.ceil() method of the Math class, this method gives us the ceiling value or the upper bond of a value. //For example for Math.ceil(3.1) will give us 4.0 and for Math.ceil(1.9) will give us 2.0. cansPaintNeeded = Math.ceil(gallonsPaintNeeded); System.out.println("Cans needed: "+cansPaintNeeded+" can(s)"); //we print the result. } }
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