bubble sort in c ++

Bubble sort 

#include<iostream.h>                                                          

void bubblesort(int[], int);                                                  

void main()                                                                   

{                                                                               

     int ar[50], item, n, index;                                                  

     cout<<"\n how many elements do u want to create array      with?...";  
           

     cin>>n;                                                                     

     cout<<"\n enter aray elements..\n";                                          

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

     cin>>ar[i];                                                                

     bubblesort(ar, n);                                                           

    cout<<"\n the sorted array is as shown  below...\n";     
                  

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

    cout<<ar[i]<<" ";                                                          

    cout<<endl;                                                                 

}                                                                             

 void bubblesort (int ar[], int size)                                          

 {                                                                              

        int tmp, ctr=0;

        for(int i=0; i<size; i++)                                                    

        {                                                                               

            for(int j=0;j<(size-1);j++)                                                  

            {                                                                              

                 if(ar[j]>ar[j+1])                                                             

                 {                                                                              

                     tmp=ar[j];                                                                   

                     ar[j]=ar[j+1];                                                               

                     ar[j+1]=tmp;                                                               

                 }                                                                          

            }                                                                            

        cout<<" array after iteration -"<<++ctr<<" -is:";                             

             for(int k=0; k<size;k++)                                                       

             cout<<ar[k]<<" ";                                                          

             cout<<endl;                                                                 

        }                                                                          

 }