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Bubble sort in C++

#include <iostream>  
using namespace std; 
 
int main() 
{ 
  int a[5],i,j,t;
    cout<<"\nEnter five elemnts:";
    for(i=0;i<5;i++)
        cin>>a[i];
    for(i=0;i<5;i++)
        for(j=i+1;j<5;j++)
            if(a[i]>a[j])
            {
                t=a[i];
                a[i]=a[j];
                a[j]=t;
            }
    cout<<"\n Ascending order\n";
    for(i=0;i<5;i++)
        cout<<a[i]<<"\n";
    cout<<"\n Descending order\n";
    for(i=4;i>=0;i--)
        cout<<a[i]<<"\n";
    return 0;
}