insertion sort programm in cpp c++ data structure

 #include<iostream>

using namespace std;

int main()
{
    int i,j,n,temp,a[30];
    cout<<"Enter the number of elements:";
    cin>>n;
    cout<<"\nEnter the elements\n";

    for(i=0;i<n;i++)
    {
        cin>>a[i];
    }

    for(i=1;i<n;i++)
    {

        for(j=1;j<n;j++)
        {
            if(a[j]<a[j-1])
            {
                temp=a[j-1];
                a[j-1]=a[j];
                a[j]=temp;
            }
        }


    }

    cout<<"\nSorted list is as follows\n";
    for(i=0;i<n;i++)
    {
        cout<<a[i]<<" ";
    }

    return 0;
}