以反向模式打印三角形字母的C语言程序

编写一个C语言程序，使用for循环打印三角形的字母。

#include <stdio.h

int main() { int rows;


printf("Enter Triangle of Alphabets in Reverse Rows = ");
scanf("%d", &rows);

printf("printing Triangle of Alphabets in Reverse Order\\n");

int alphabet = 65;

for (int i = rows - 1; i >= 0; i--)
{
	for (int j = 0; j < i; j++)
	{
		printf(" ");
	}
	for (int k = i; k <= rows - 1; k++)
	{
		printf("%c ", alphabet + k);
	}
	printf("\\n");
}

这个C模式的例子使用while循环按降序或逆序打印字母的三角形。

#include <stdio.h>.

int main() { int rows, i, j, k, alphabet;


printf("Enter Triangle of Alphabets in Reverse Rows = ");
scanf("%d", &rows);

printf("printing Triangle of Alphabets in Reverse Order\\n");

alphabet = 65;

i = rows - 1;
while (i >= 0)
{

	j = 0;
	while (j < i)
	{
		printf(" ");
		j++;
	}

	k = i;
	while (k <= rows - 1)
	{
		printf("%c ", alphabet + k);
		k++;
	}
	printf("\\n");
	i--;
}

Enter Triangle of Alphabets in Reverse Rows = 17
printing Triangle of Alphabets in Reverse Order
                Q 
               P Q 
              O P Q 
             N O P Q 
            M N O P Q 
           L M N O P Q 
          K L M N O P Q 
         J K L M N O P Q 
        I J K L M N O P Q 
       H I J K L M N O P Q 
      G H I J K L M N O P Q 
     F G H I J K L M N O P Q 
    E F G H I J K L M N O P Q 
   D E F G H I J K L M N O P Q 
  C D E F G H I J K L M N O P Q 
 B C D E F G H I J K L M N O P Q 
A B C D E F G H I J K L M N O P Q

这个C语言的例子使用do while循环，以相反的顺序打印字母的三角形图案。

#include <stdio.h>.

int main() { int rows, i, j, k, alphabet;

printf("Enter Triangle of Alphabets in Reverse Rows = ");
scanf("%d", &rows);

printf("printing Triangle of Alphabets in Reverse Order\\n");

alphabet = 65;

i = rows - 1;
do
{

	j = 0;
	do
	{
		printf(" ");

	} while (j++ < i);

	k = i;
	do
	{
		printf("%c ", alphabet + k);

	} while (++k <= rows - 1);

	printf("\\n");

} while (--i >= 0);

Enter Triangle of Alphabets in Reverse Rows = 14
printing Triangle of Alphabets in Reverse Order
              N 
             M N 
            L M N 
           K L M N 
          J K L M N 
         I J K L M N 
        H I J K L M N 
       G H I J K L M N 
      F G H I J K L M N 
     E F G H I J K L M N 
    D E F G H I J K L M N 
   C D E F G H I J K L M N 
  B C D E F G H I J K L M N 
 A B C D E F G H I J K L M N