Slip 16_1: Sort a random array of n integers (accept the value of n from user) in ascending order by using Counting sort algorithm

-

 Solution :

#include<stdio.h>

void countingsort(int a[20],int n,int k)

{

 int count[50],b[30],i;

 for(i=0;i<=k;i++)

 { count[i]=0;

 }

for(i=0;i<n;i++)

 { ++count[a[i]];

 }

 for(i=1;i<=k;i++)

 { count[i]=count[i]+count[i-1];

 }

 for(i=n-1;i>=0;i--)

 { b[--count[a[i]]]=a[i];

 }

 //copy sorted array b to original array b

 for(i=0;i<n;i++)

 { a[i]=b[i];

 }


}

main()

{

 int a[20],n,i,max;

 printf("Enter how many elements ");

 scanf("%d",&n);

 for(i=0;i<n;i++)

 { a[i]=rand()%10;

 }

 printf("\n Before sort array is ");

 for(i=0;i<n;i++)

 {

 printf("%d ",a[i]);

 }

 max=a[0];

 for(i=1;i<n;i++)

 { if(a[i]>max)

 max=a[i];

 }

 countingsort(a,n,max);

 printf("\n Afer sorting array is ");

 for(i=0;i<n;i++)

 { printf("%d ",a[i]);

 }

}


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