小编Eni*_*ang的帖子

当我在语句中编辑代码时,它会替换它周围的当前代码.我找不到用普通光标替换它的方法,该光标只插入数据而不是替换它.Eclipse中的功能是否可行？

我有Windows 10(64位).我想利用这个Openpyxl包开始学习如何与excel和其他电子表格进行交互.

我安装了Python,"windowsx86-64web-basedinstaller"我有64位操作系统,在尝试安装此版本时我错了吗？

import javax.swing.JApplet;
import java.awt.*;

public class Snowman extends JApplet {
//---------------------------------------------
// Draws a snowman.
//---------------------------------------------
public void paint (Graphics page)
{
    final int MID = 150;
    final int TOP = 50;

    setBackground (Color.cyan);

    page.setColor(Color.blue);
    page.fillRect(0, 175, 300, 50); // ground

    page.setColor (Color.yellow);
    page.fillOval (-40, -40, 80, 80); // sun

    page.setColor (Color.white);
    page.fillOval (MID-20, TOP, 40, 40); // head
    page.fillOval (MID-35, TOP+35, 70, 50); // upper torso
    page.fillOval (MID-50, TOP+80, 100, 60); // lower torso

    page.setColor (Color.black);
    page.fillOval(MID-10, TOP+10, 5, …

public class S1P3 {
    public static void main (String[] args) throws Exception{
        int num1 = (int)(Math.round(Math.random()*10));
        int num2 = (int)(Math.round(Math.random()*10));
        int sign = (int)(Math.round(Math.random()*3));
        int answer;
        System.out.println("\n\n*****");
        if(sign==0)
        {
            System.out.println(num1+" * "+num2);
            answer = num1*num2;
        }
        else if(sign==1)
        {
            System.out.println(num1+" / "+num2);
            answer = num1/num2;
        }
        else if(sign==1)
        {
            System.out.println(num1+" - "+num2);
            answer = num1-num2;
        }
        else
        {
            System.out.println(num1+" % "+num2);
            answer = num1%num2;
        }
        System.out.println("*****\n");
        System.out.println("3 ...");
        Thread.sleep(1000);
        System.out.println("2 ...");
        Thread.sleep(1000);
        System.out.println("1 ...");
        Thread.sleep(1000);

        System.out.println("ANSWER: "+answer);
    }
}

我不明白两个"其他ifs"的符号如何等于2.该程序如何知道选择哪一个？因为2个选项等于1所以不意味着其中一个没有被使用？我使用的这本书有错字吗？我可以用一些澄清,谢谢!