Sorting in 2-D Array (Column Wise sorting) in C++/C

#include<iostream>
using namespace std;

main()
{
int a[3][3];
int i,j,k,l;
cout<<"Enter Elements:3x3 Matrix";
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
cin>>a[i][j];
}
for(i=0;i<3;i++)
{

for(j=0;j<3;j++)
{
for(k=0;k<2;k++)
{
if(a[i][k]>a[i][k+1])
{
swap(a[i][k],a[i][k+1]);
}
}
}
}
cout<<"Sorted Matrix Is: \n";
for(i=0;i<3;i++)
{
cout<<"\n";
for(j=0;j<3;j++)

cout<<a[i][j];
}
}