To print spiral pattern using numbers

This program can print the spiral pattern using numbers.

Logic:

• Get the length of the pattern from the user.
• Then prints the numbers in the pattern using some conditions.
• This gives the pattern in a spiral structure.

Algorithm:

1. Get the length of the pattern from the user.
2. The pattern is divided into four parts as the top left, top right, left bottom and right bottom.
3. For each pattern, the loop can print the largest value.
4. After completion of all parts gives spiral structure.

Program:

#include<stdio.h>
void main()
{
    int i,j,n;
    clrscr();
    printf("enter the number:");
    scanf("%d",&n);
    for(i=n;i>1;i--)
    {
	for(j=n;j>=1;j--)//prints top left of the pattern
	{
	    if(j>i)
		printf("%d ",j);
	    else
		printf("%d ",i);
	}
	for(j=2;j<=n;j++)//prints top right of the pattern
	{
	    if(j>i)
		printf("%d ",j);
	    else
		printf("%d ",i);
	}
	printf("\n");
    }
    for(i=1; i<=n; i++)
    {
	for(j=n;j>=1;j--)//prints left bottom of the pattern
	{
	    if(j>i)
		printf("%d ",j);
	    else
		printf("%d ",i);
	}
	for(j=2;j<=n;j++)//prints right bottom of the pattern
	{
	    if(j>i)
		printf("%d ",j);
	    else
		printf("%d ",i);
	}
	printf("\n");
    }
    getch();
}