C Program to Implement Bubble Sort in C Programming

Program :

#include<stdio.h>
#include<conio.h>
#include<stdio.h>
void bubble_sort(int [],int);
void main()
{
    int a[30],n,i;
     printf("\nEnter no of elements :");
     scanf("%d",&n);
     printf("\nEnter array elements :");
     for(i=0;i<n;i++)
      scanf("%d",&a[i]);
     bubble_sort(a,n);
     getch();
}
//--------------------------------- Function 
void bubble_sort(int a[],int n)
{
int i,j,k,temp;
   printf("\nUnsorted Data:");
    for(k=0;k<n;k++)
         printf("%5d",a[k]);
    for(i=1;i< n;i++)
    {
         for(j=0;j< n-1;j++)
         if(a[j]>a[j+1])
               {
               temp=a[j];
               a[j]=a[j+1];
               a[j+1]=temp;
               }
    printf("\nAfter pass %d : ",i);
        for(k=0;k< n;k++)
             printf("%5d",a[k]);
    }
}

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What Happens After Each Iteration ?

1. There are ‘N’ number of Unsorted Elements
2. Total Number of Iterations = N-1
3. At the End of First Iteration : Largest Element Will get its Exact Final Position
4. At the End of 2nd Iteration : 2nd Largest Element Will get its Exact Final Position
5. .
6. .
7. .
8. .
9. At the End of (N-1)th Iteration : (N-1)th Largest Element Will get its Exact Final Position

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Output :

Enter no of elements :5

Enter array elements :10 4 55 21 6

Unsorted Data: 10 4 55 21 6

After pass 1 : 4 10 21 6 55

After pass 2 : 4 10 6 21 55

After pass 3 : 4 6 10 21 55

After pass 4 : 4 6 10 21 55