使用＃在单个块中打印矩形的代码 [英] Code that will draw a rectangle using # prints in single block

问题描述

我的教授让我：

在java中创建一个读取矩形长度和宽度的代码。使用字符＃绘制具有给定尺寸的矩形的绘制。程序应该连续读取数字对。

Create a code in java that will reads the length and the width of rectangle. Drawing of a rectangle with the given dimensions would be drawn using the character "#" . the program should continuously read pairs of numbers.

（第一个长度，然后是宽度）并在输入结束后输出计算出的QPI遇见。

(first length, then width) and outputs the calculated QPI after the end of input is met.

输入：

Input:

输入文件将包含一系列由空格分隔的整数对;每行一对整数。每对中的第一个数字是矩形的长度，而另一个是宽度。

The input file will consist of a series of pairs of integers separated by a space; one pair of integers per line. The first number in each pair is the rectangle's length while the other one is the width.

输出：

每个矩形（带有输入的尺寸）都使用字符'＃'输出。

Each rectangle (with the inputted dimensions) is ouputted using the character '#'.

每次绘图后应该有一个空格。

There should be an empty space after each drawing.

样本输入：

1 1
2 2
3 3

样本输出：

#

##
##

###
###
###

这是我创建的代码，但只输入一组数字

This is the code that I create but only 1 set of numbers is only input

import java.io.*;

public class ActivityThree {
    public static void main (String[] args) {
    BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));
    String input = "";
    String output = "";
    int a = 0;
    int b = 0;
    int inputParse = 0;
    int outputParse = 0;
    try{
        System.out.print("Enter Length: ");
        input = dataIn.readLine();
        System.out.print("Enter Width: ");
        output = dataIn.readLine();
    }catch( IOException e ){
        System.out.println("Error!");
    }
    inputParse = Integer.parseInt(input);
    outputParse = Integer.parseInt(output);

    for(a = inputParse; a > 0; a--) {
        for(b=0; b < outputParse; b++) {
            if(a >= inputParse)
                System.out.print("#");
            else
                System.out.print("#");
        }
        System.out.print("\n");
        }
    }
}

推荐答案

这是我创建的代码，但只输入一组数字

This is the code that I create but only 1 set of numbers is only input

实际上，您的代码按预期使用＃打印一个矩形。您只需使用循环结构就可以多次完成此工作。有三个循环结构来完成此任务：

Indeed your code prints a rectangle using # as expected. You just need to use a loop structure to make this work many times. There are three loop structures to accomplish this:

• while


• do-while


• for

• while
• do-while
• for

由您决定使用哪一个（由于这是练习，因此不再显示）。更多信息：

It's up to you to decide which one to use (not showing more since this is an exercise). More info:

• 而和 do-while 语句


• for 声明

• The while and do-while Statements
• The for Statement

顺便说一句，你是已经在解决方案中使用 for 循环来控制在一行中编写字符所需的次数。您可以将这些语句中的另一个用于更大的代码块。只需识别您需要重复一段时间的代码块，可能是因为用户输入（提示： System.out.print（输入长度：）; ）。

By the way, you're already using a for loop in your solution to control how many times you need to write a character in a line. You can use another of these statements for a bigger block of code. Just identify the block of code that you need to repeat an amount of times, probably since the user input (hint: System.out.print("Enter Length: ");).

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