rombo di *

void rombo(int h){
    int k=h/2;
    for(int i=0;i<k;i++){
        for(int j=0;j<h;j++){
            if(j>=k-i && j<=k+i)
                cout<<"*";
            else
                cout<<" ";}
        cout<<"\n";}
    for(int i=0;i<h;i++)
        cout<<"*";
    cout<<"\n";
    for(int i=k-1;i>-1;i--){
        for(int j=h-1;j>-1;j--){
            if(j>=k-i && j<=k+i)
                cout<<"*";
            else
                cout<<" ";}
        cout<<"\n";}
}