Java 打印倒三角形数字模式的程序

使用 for 循环编写一个 Java 程序来打印倒三角形数字模式。

package Shapes3;

import java.util.Scanner;

public class InvertedTriangleNum1 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Inverted Triangle Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Inverted Triangle Number Pattern");
		
		for (int i = 1; i <= rows; i++ ) 
		{
			for (int j = 1; j < i; j++ ) 
			{
				System.out.print(" ");
			}
			for(int k = 1; k <= rows - i + 1; k++) 
			{
				System.out.print(k + " ");
			}
			System.out.println();
		}
	}
}

此程序使用 while 循环打印数字的倒三角形模式。

package Shapes3;

import java.util.Scanner;

public class InvertedTriangleNum2 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Inverted Triangle Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Inverted Triangle Number Pattern");
		int j, k, i = 1;
		
		while(i <= rows ) 
		{
			j = 1;
			while (j < i ) 
			{
				System.out.print(" ");
				j++;
			}
			
			k = 1;
			while(k <= rows - i + 1) 
			{
				System.out.print(k + " ");
				k++;
			}
			System.out.println();
			i++;
		}
	}
}

Enter Inverted Triangle Number Pattern Rows = 5
Printing Inverted Triangle Number Pattern
1 2 3 4 5 
 1 2 3 4 
  1 2 3 
   1 2 
    1 

这个 Java 示例 使用 do while 循环显示数字的倒三角形模式。

package Shapes3;

import java.util.Scanner;

public class InvertedTriangleNum3 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Inverted Triangle Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Inverted Triangle Number Pattern");
		int j, k, i = 1;
		
		do
		{
			j = 1;
			do 
			{
				System.out.print(" ");
				
			} while (j++ < i );
			
			k = 1;
			do 
			{
				System.out.print(k + " ");

			} while(++k <= rows - i + 1);
			
			System.out.println();

		} while(++i <= rows ) ;
	}
}

Enter Inverted Triangle Number Pattern Rows = 9
Printing Inverted Triangle Number Pattern
 1 2 3 4 5 6 7 8 9 
  1 2 3 4 5 6 7 8 
   1 2 3 4 5 6 7 
    1 2 3 4 5 6 
     1 2 3 4 5 
      1 2 3 4 
       1 2 3 
        1 2 
         1