打印沙漏数字图案的C语言程序

编写一个C语言程序，使用for循环打印沙漏数字模式。

#include <stdio.h

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

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

printf("The Sandglass Number Pattern\\n"); 

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

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

这个C语言例子使用while循环打印沙漏图案中的数字。

#include <stdio.h>.

int main() { int i = 1, j, k, rows;

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

printf("\\nThe Sandglass Number Pattern\\n"); 

while( i <= rows)
{
	j = 1;
	while( j < i)	
	{
		printf(" ");
	    j++;
    }

    k = i;
    while( k <= rows )
    {
		printf("%d ", k);
		k++;
	}
	printf("\\n");
	i++;
}

i = rows - 1;
while( i >= 1)
{
    j = 1;
	while( j < i)
	{
		printf(" ");
	    j++;
    }

    k = i;
    while( k <= rows )
    {
		printf("%d ", k);
	    k++;
    }
	printf("\\n");
	i--;
}
	
return 0;

Enter Sandglass Number Pattern Rows = 7

The Sandglass Number Pattern
1 2 3 4 5 6 7 
 2 3 4 5 6 7 
  3 4 5 6 7 
   4 5 6 7 
    5 6 7 
     6 7 
      7 
     6 7 
    5 6 7 
   4 5 6 7 
  3 4 5 6 7 
 2 3 4 5 6 7 
1 2 3 4 5 6 7

使用do while循环显示沙漏数字模式的C程序。

#include <stdio.h>

int main() { int i = 1, j, k, rows;

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

printf("\\nThe Sandglass Number Pattern\\n"); 

do
{
	j = 1;
	do	
	{
		printf(" ");

    } while( j++ < i);

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

	} while( ++k <= rows );
	printf("\\n");

} while( ++i <= rows);

i = rows - 1;
do
{
    j = 1;
	do
	{
		printf(" ");
		
    } while( j++ < i);

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

    } while( ++k <= rows );
	printf("\\n");

} while( --i >= 1);
	
return 0;

Enter Sandglass Number Pattern Rows = 9

The Sandglass Number Pattern
 1 2 3 4 5 6 7 8 9 
  2 3 4 5 6 7 8 9 
   3 4 5 6 7 8 9 
    4 5 6 7 8 9 
     5 6 7 8 9 
      6 7 8 9 
       7 8 9 
        8 9 
         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