Difference between these two-

Question

https://code.sololearn.com/csU79fw41EGr/?ref=app
AND

#include <iostream>
using namespace std;

int main() {
int a [20],i,j,n,k;
cout<<"enter n\n";
cin>>n;
cout<<"enter the array\n";
for (i=0;i<n;i++)
cin>>a [i];
for (i=1;i<n;i++)
{
k=a [i];
for (j=i-1;j>=0;j--)
{if (k <a [j])
a [j+1]=a [j];
}
a [j+1]=k;
}
cout<<"sorted array is\n";
for (i=0;i<n;i++)
cout<<a [i]<<endl;
return 0;
}