Question

I want to print only n first elements from bst tree so i added global variable counter

int a = 0;
void print (wezel **korzen,int x)
{
    if((*korzen) != NULL && (a < x))
    {
        print( &((*korzen)->lewe),x );
        a++;
        printf("%s %d\n", (*korzen)->wartosc, (*korzen)->ile);
        print( &((*korzen)->prawe),x );
    }
}

but this condition in if does not work ? where i made mistake ?

Answer 1

As I mentioned in my comments, you don’t check a after the first print:

int a = 0;
void print (wezel **korzen,int x)
{
    if((*korzen) != NULL && (a < x))
    {
        print( &((*korzen)->lewe),x );
        // A has incremented since last check
        if (a < x) {
            printf("%s %d\n", (*korzen)->wartosc, (*korzen)->ile);
            a++;
            print( &((*korzen)->prawe),x );
        }
    }
}