打印左箭头数字图案的C语言程序

编写一个C语言程序，使用for循环打印左箭头数字模式。

#include <stdio.h>

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


printf("Enter Left Arrow Number Pattern Rows = ");
scanf("%d", &rows);

printf("Printing Left Arrow Numbers Pattern\\n");

for (i = rows; i >= 1; i--)
{
	for (j = i; j >= 1; j--)
	{
		printf("%d ", j);
	}
	printf("\\n");
}

for (i = 2; i <= rows; i++)
{
	for (j = i; j >= 1; j--)
	{
		printf("%d ", j);
	}
	printf("\\n");
}

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这个C语言例子使用while循环打印数字模式的左箭头。

#include <stdio.h>.

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


printf("Enter Left Arrow Number Pattern Rows = ");
scanf("%d", &rows);

printf("Printing Left Arrow Numbers Pattern\\n");
i = rows;

while (i >= 1)
{
	j = i;
	while (j >= 1)
	{
		printf("%d ", j);
		j--;
	}
	printf("\\n");
	i--;
}

i = 2;
while (i <= rows)
{
	j = i;
	while (j >= 1)
	{
		printf("%d ", j);
		j--;
	}
	printf("\\n");
	i++;
}

Enter Left Arrow Number Pattern Rows = 11
Printing Left Arrow Numbers Pattern
11 10 9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
7 6 5 4 3 2 1 
6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1 
2 1 
3 2 1 
4 3 2 1 
5 4 3 2 1 
6 5 4 3 2 1 
7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 

这个C范例使用do while循环来打印数字的左箭头模式。

#include <stdio.h>

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


printf("Enter Left Arrow Number Pattern Rows = ");
scanf("%d", &rows);

printf("Printing Left Arrow Numbers Pattern\\n");
i = rows;

do
{
	j = i;
	do
	{
		printf("%d ", j);

	} while (--j >= 1);
	printf("\\n");

} while (--i >= 1);

i = 2;
do
{
	j = i;
	do
	{
		printf("%d ", j);

	} while (--j >= 1);
	printf("\\n");

} while (++i <= rows);

Enter Left Arrow Number Pattern Rows = 13
Printing Left Arrow Numbers Pattern
13 12 11 10 9 8 7 6 5 4 3 2 1 
12 11 10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
7 6 5 4 3 2 1 
6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1 
2 1 
3 2 1 
4 3 2 1 
5 4 3 2 1 
6 5 4 3 2 1 
7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
12 11 10 9 8 7 6 5 4 3 2 1 
13 12 11 10 9 8 7 6 5 4 3 2 1