Java 打印直角三角形字母图案程序

编写一个 Java 程序，使用 for 循环打印直角三角形字母图案。

package Alphabets;

import java.util.Scanner;

public class RightTriangleAlphabets1 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Right Triangle Alphabets Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Triangle Alphabets Pattern");
		int alphabet = 65;
		
		for (int i = 0 ; i < rows; i++ ) 
		{
			for (int j = 0 ; j <= i; j++ ) 	
			{
				System.out.print((char)(alphabet + j) + " ");
			}
			System.out.println();
		}
	}
}

此Java示例使用 while 循环以直角三角形图案显示字母。

package Alphabets;

import java.util.Scanner;

public class RightTriangleAlphabets2 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Right Triangle Alphabets Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Triangle Alphabets Pattern");
		int alphabet = 65, i = 0, j;
		
		while( i < rows ) 
		{
			j = 0 ; 
			while (j <= i ) 	
			{
				System.out.print((char)(alphabet + j) + " ");
				j++;
			}
			System.out.println();
			i++;
		}
	}
}

Right Triangle Alphabets Pattern Rows = 9
Printing Right Triangle Alphabets Pattern
A 
A B 
A B C 
A B C D 
A B C D E 
A B C D E F 
A B C D E F G 
A B C D E F G H 
A B C D E F G H I 

Java 程序使用 do while 循环打印直角三角形字母图案。

package Alphabets;

import java.util.Scanner;

public class RightTriangleAlphabets3 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Right Triangle Alphabets Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Triangle Alphabets Pattern");
		int alphabet = 65, i = 0, j;
		
		do
		{
			j = 0 ; 
			do 	
			{
				System.out.print((char)(alphabet + j) + " ");
				
			} while (++j <= i) ;
			
			System.out.println();

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

Right Triangle Alphabets Pattern Rows = 14
Printing Right Triangle Alphabets Pattern
A 
A B 
A B C 
A B C D 
A B C D E 
A B C D E F 
A B C D E F G 
A B C D E F G H 
A B C D E F G H I 
A B C D E F G H I J 
A B C D E F G H I J K 
A B C D E F G H I J K L 
A B C D E F G H I J K L M 
A B C D E F G H I J K L M N