Frohe Weihnacht!

[lkjlkj]

#include <string>
    #include <iostream>

    inline void oh_tannenbaum(unsigned n){
        std::string part;

        for(unsigned i=0; i!=n*2; i += 2){
            part = std::string(i + 1, '*');
            std::cout << std::string((n*2 + 3)/2 - part.size()/2, ' ') << part << '\n';
            part = std::string(i + 3, '*');
            std::cout << std::string((n*2 + 3)/2 - part.size()/2, ' ') << part << '\n';
            part = std::string(i + 5, '*');
            std::cout << std::string((n*2 + 3)/2 - part.size()/2, ' ') << part << '\n';
        }

        std::cout << std::string((n*2 + 3)/2 - 3/2, ' ') << "###" << '\n';
    }

    int main(){
    	oh_tannenbaum(10);
    }

[zufallswert]

o(_,0,[]). o(O,O0,Oo):-O0>0,O01 is O0-1,o(O,O01,L),append(L,O,Oo).
oo(O,O0):-length(O,N),o(" ",(25-N)//2,O1),append(O1,O,O0).
oO(O,O0):-o(O,O0,Oo),oo(Oo,OO),atom_codes(O0o,OO),write(O0o),nl.
o0(O):-O0 is 2*O-1,oO("*",O0),oO("*",O0+2),oO("*",O0+4).
o0o(0):-!. o0o(O):-O>0,Oo is O-1,o0o(Oo),o0(O). oO0:-o0o(10),oO("#",3).

gprolog --consult-file ... --entry-goal oO0