Question

最近，当我遇到一些变量问题时，我试图自动编写javascript代码。

Scanner scan = new Scanner(System.in);
System.out.print("Enter x start coordinate: ");
int xCoord = scan.nextInt();
System.out.print("Enter y start coordinate: ");
int yCoord = scan.nextInt();
String more = "y";
int num1 = 0 + xCoord;
int num2 = 5 + yCoord;
int num3 = 13 + xCoord;
int num4 = 10 + yCoord;
System.out.println("ctx.moveTo(" + num1 + "," + num2 + ");"
        + "\nctx.lineTo(" + num3 + "," + num4 + ")\n"
        + "Mid Point: " + num3 + "," + num4);
System.out.print("Again?: ");
more = scan.next();
while (more.equals("y"))
{
    System.out.println("Enter a direction (above, left, right): ");
    String nextDir = scan.next();
    if (nextCube.equals("right"))
    {
        xCoord += 13;
        yCoord += 5;
    }
    else if (nextDir.equals("left"))
    {
        xCoord -= 13;
        yCoord += 5;
    }
    else if (nextDir.equals("above"))
    {
        yCoord -= 18;
    }
    System.out.println("ctx.moveTo(" + num1 + "," + num2 + ");"
        + "\nctx.lineTo(" + num3 + "," + num4 + ")\n"
        + "Mid Point: " + num3 + "," + num4);
    System.out.print("Again?: ");
    more = scan.next();
}

我发现在要求方向移动之后，xCoord和yCoord变量会发生变化，但是＆＃34; num＆＃34;变量没有随新值一起更新。我知道我的思维过程一定有什么问题，因为依赖变量在Java中是如何工作的，但我不知道是什么。求救！

Answer 1

也许您需要在循环中更新“num”变量，例如：

while (more.equals("y"))
{
    ...

    // Add below codes
    num1 = 0 + xCoord;
    num2 = 5 + yCoord;
    num3 = 13 + xCoord;
    num4 = 10 + yCoord;

    System.out.println("ctx.moveTo(" + num1 + "," + num2 + ");"
        + "\nctx.lineTo(" + num3 + "," + num4 + ")\n"
        + "Mid Point: " + num3 + "," + num4);
    System.out.print("Again?: ");
    more = scan.next();
}

在Java中基于另一个int更改int

1 个答案: