Jan 9, 2012

C Program to implement bucket sort.

Write C program to implement bucket sort.
The idea of Bucket Sort is to divide the interval [0, 1] into n equal-sized sub intervals, or buckets, and then distribute the n input numbers into the buckets. To produce the output, we simply sort the numbers in each bucket and then go through the buckets in order, listing elements in each.
Bucket sort runs in linear time when the input is drawn from a uniform distribution. Read more about C Programming Language .
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#include<stdio.h>
void Bucket_Sort(int array[], int n)
{   
 int i, j;   
 int count[n];  
 for(i=0; i < n; i++)
 {   
  count[i] = 0;   
 }     
 for(i=0; i < n; i++)
 {    
  (count[array[i]])++; 
 }     
 for(i=0,j=0; i < n; i++)
 {   
  for(; count[i]>0;(count[i])--) 
  {       
   array[j++] = i; 
  }  
 }   
}    
int main() 
{ 
 int array[100];   
 int num;   
 int i;  
 printf("Enter How many Numbers : ");    
 scanf("%d",&num);    
 printf("Enter the %d elements to be sorted:\n",num);  
 for(i = 0; i < num; i++ )
 {   
  scanf("%d",&array[i]);  
 }   
 printf("\nThe array of elements before sorting : \n"); 
 for (i = 0;i < num;i++) 
 {    
  printf("%d ", array[i]);   
 }    
 printf("\nThe array of elements after sorting : \n");  
 Bucket_Sort(array, num);  
 for (i = 0;i < n;i++) 
 {     
  printf("%d ", array[i]);  
 }   
 printf("\n");      
 return 0; 
} 

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