我正试图修复我的代码，使加仑的油漆需要轮升而不是轮降（因为你不能买.2加仑的油漆）[重复]

Question

对于这个程序，我们必须让用户输入房间的尺寸，并计算出平方英尺，然后用它来查看需要多少加仑的油漆。一加仑油漆覆盖350平方英尺。我需要帮助完成一个我困惑的if语句。我希望它是这样的，如果需要多少油漆有余数（例如：需要1.2加仑，它将四舍五入表示您需要2加仑的油漆）。有谁能帮我解决这个问题吗？我对所有的int和if语句都搞混了。

import java.util.Scanner;

//declare variables
class Main {
  final int  COVERAGE = 350; //paint covers 350sq. feet
  int length, width, height;
  double totalSqFt, paintNeeded;
    //declare integers length, width, height
    //declare doubles totalSqFt, paintNeeded
  Scanner scan = new Scanner(System.in);

  //this will run all the main methods
  public void runProgram()
  {
    input();
    calculations();
    output();
  }
  
  //this will get the user input for the length, height, and width of the room
  public void input()
    {
    System.out.println("Length of room:");
    length = scan.nextInt();
    scan.nextLine();
    System.out.println("Height of room:");
    height = scan.nextInt();
    scan.nextLine();
    System.out.println("Width of room:");
    width = scan.nextInt();
    scan.nextLine();
        //Prompt for and read in the length of the room
        //Prompt for and read in the height of the room
        //Prompt for and read in the width of the room
  }
  
  //this calculates the user data for the amount of paint needed 
    public void calculations()
  {
    totalSqFt = ((width * height) + (length * height)) * 2;
    paintNeeded = (int)(totalSqFt) / (COVERAGE);

    if (totalSqFt % COVERAGE)
    {
      paintNeeded = paintNeeded + 1;
    }

    if (totalSqFt < 350){
      paintNeeded = 1;
    }else{
      
      paintNeeded = (int)(totalSqFt) / (COVERAGE);
    }
        //Compute the total square feet of the walls to be painted
        //Computer the amount of paint needed
    }

    //this prints out the calculations above
  public void output()
  {
        System.out.println("Length: " + length + " Width: " + width + " Height: " + height);
    System.out.println("Total Square Feet: " + totalSqFt + " \nGallons of Paint Needed: " + paintNeeded);
    //Print the length, width, and height of the room and the gallons of paint needed.
    }

  public static void main(String[] args)
  {
    Main prog = new Main();
    prog.runProgram();
  }

}```

Answer 1

您可以尝试使用以下calculations()方法：

public void calculations()
  {
    totalSqFt = ((width * height) + (length * height)) * 2;
    paintNeeded = (int) Math.ceil(totalSqFt / COVERAGE);
  }