Question

我正在为学校做作业，而且我完全不知道如何使用循环。下面是代码：

import java.util.Scanner; 

public class DrawHalfArrow {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        int arrowBaseHeight = 0;
        int arrowBaseWidth  = 0;
        int arrowHeadWidth = 0;

        System.out.println("Enter arrow base height: " + arrowBaseHeight);
        arrowBaseHeight = scnr.nextInt();

        System.out.println("Enter arrow base width: " + arrowBaseWidth);
        arrowBaseWidth = scnr.nextInt();

        System.out.println("Enter arrow head width: " + arrowHeadWidth);
        arrowHeadWidth = scnr.nextInt();

        // Draw arrow base (height = 3, width = 2)
        System.out.println("**");
        System.out.println("**");
        System.out.println("**");

        // Draw arrow head (width = 4)
        System.out.println("****");
        System.out.println("***");
        System.out.println("**");
        System.out.println("*");

        return;
    }
}

我想知道是否有人可以帮助我？我甚至不知道从哪里开始......

基本上我们必须这样做，以便箭头的基础，高度和宽度的用户输入根据用户输入的内容而改变。任何有关如何处理此事的帮助将不胜感激。

Answer 1

import java.util.Scanner; 

public class DrawHalfArrow{
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
int arrowBaseHeight = 0;
int arrowBaseWidth  = 0;
int arrowHeadWidth = 0;

System.out.println("Enter arrow base height: " + arrowBaseHeight);
arrowBaseHeight = scnr.nextInt();

System.out.println("Enter arrow base width: " + arrowBaseWidth);
arrowBaseWidth = scnr.nextInt();

System.out.println("Enter arrow head width: " + arrowHeadWidth);
arrowHeadWidth = scnr.nextInt();

// Draw arrow base (height = 3, width = 2)
for (int i = 0; i < arrowBaseHeight; i++) {
for (int j = 0; j < arrowBaseWidth; j++) {
System.out.print("*");
}
System.out.println();
}

// Draw arrow head (width = 4)

for (int i = 0; i < arrowHeadWidth; i++) {
for (int j = arrowHeadWidth; j>i; j--) {
    System.out.print("*");
}
System.out.println();
}

}

}

使用循环命令进行学校作业

1 个答案: