编写一个Java程序，使用for循环来打印三角形数字的反向模式。
package Shapes3;
import java.util.Scanner;
public class TriangleNumRev1 {
private static Scanner sc;
public static void main(String\[\] args) {
sc = new Scanner(System.in);
System.out.print("Enter Triangle of Numbers in Reverse Rows = ");
int rows = sc.nextInt();
System.out.println("Triangle of Numbers in Reverse Order Pattern");
for (int i = rows; i >= 1; i-- )
{
for (int j = 1; j < i; j++ )
{
System.out.print(" ");
}
for(int k = i; k <= rows; k++)
{
System.out.print(k + " ");
}
System.out.println();
}
}
这个Java程序使用while循环以降序或逆序打印数字的三角形图案。
package Shapes3;
import java.util.Scanner;
public class TriangleNumRev2 {
```pgsql
private static Scanner sc;
public static void main(String\[\] args) {
sc = new Scanner(System.in);
System.out.print("Enter Triangle of Numbers in Reverse Rows = ");
int rows = sc.nextInt();
System.out.println("Triangle of Numbers in Reverse Order Pattern");
int j, k, i = rows;
while(i >= 1 )
{
j = 1;
while(j < i)
{
System.out.print(" ");
j++;
}
k = i;
while(k <= rows)
{
System.out.print(k + " ");
k++;
}
System.out.println();
i--;
}
}
}
Enter Triangle of Numbers in Reverse Rows = 9
Triangle of Numbers in Reverse Order Pattern
9
8 9
7 8 9
6 7 8 9
5 6 7 8 9
4 5 6 7 8 9
3 4 5 6 7 8 9
2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
这个Java例子使用do while循环来显示三角形图案中的反序或降序数字。
package Shapes3;
import java.util.Scanner;
public class TriangleNumRev3 {
```pgsql
private static Scanner sc;
public static void main(String\[\] args) {
sc = new Scanner(System.in);
System.out.print("Enter Triangle of Numbers in Reverse Rows = ");
int rows = sc.nextInt();
System.out.println("Triangle of Numbers in Reverse Order Pattern");
int j, k, i = rows;
do
{
j = 1;
do
{
System.out.print(" ");
} while(j++ < i);
k = i;
do
{
System.out.print(k + " ");
} while(++k <= rows);
System.out.println();
} while(--i >= 1 ) ;
}
Enter Triangle of Numbers in Reverse Rows = 5
Triangle of Numbers in Reverse Order Pattern
5
4 5
3 4 5
2 3 4 5
1 2 3 4 5
