Create a Diamond in C++

 #include<iostream>

using namespace std;

int main()

{

int i, j, k,r;

cout<<"Enter the row of diamond   ";

cin>>r;

cout<<endl;

for(i=1;i<=r;i++)

{

for(j=1;j<=r-i;j++)

{

    cout<<" ";

}

for(k=1;k<=2*i-1;k++)

{

    cout<<"*";

}

cout<<endl;

}

for(i=r-1;i>=1;i--)

{

for(j=1;j<=r-i;j++)

{

    cout<<" ";

}

for(k=1;k<=2*i-1;k++)

{

    cout<<"*";

}

cout<<endl;

}

}