You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* Program to demonstrate shell sort */
|
|
|
|
#include <stdio.h>
|
|
#include <conio.h>
|
|
|
|
void shell(int x[],int n) ;
|
|
void show(int x[],int n) ;
|
|
|
|
void main()
|
|
{
|
|
int i, n, x[20] ;
|
|
clrscr() ;
|
|
printf("Enter the number of elements: ") ;
|
|
scanf("%d",&n) ;
|
|
printf("Enter the elements:\n") ;
|
|
for(i=0; i<n; i++)
|
|
scanf("%d",&x[i]) ;
|
|
shell(x,n) ;
|
|
printf("Sorted array is as shown:\n") ;
|
|
for(i=0; i<n; i++)
|
|
printf("%d ",x[i]) ;
|
|
getch() ;
|
|
}
|
|
|
|
void shell(int x[ ], int n)
|
|
{
|
|
int i, j, y, incr ;
|
|
incr=n/2 ;
|
|
while(incr>=1)
|
|
{
|
|
printf("incr=%d \n",incr) ;
|
|
/* Insertion sort*/
|
|
for(i=incr ; i<n ; i++)
|
|
{
|
|
y=x[i] ;
|
|
for(j=i-incr ; j>=0&&y<x[j] ; j=j-incr)
|
|
x[j+incr]=x[j] ;
|
|
x[j+incr]=y ;
|
|
show(x,n) ;
|
|
}
|
|
/* end of insertion sort*/
|
|
incr=incr/2 ;
|
|
}
|
|
}
|
|
|
|
|
|
void show(int x[ ], int n)
|
|
{
|
|
int i ;
|
|
for(i=0 ; i<n ; i++)
|
|
printf("%d ", x[i]) ;
|
|
printf("\n\n") ;
|
|
}
|
|
|