🚀 go-pugleaf

What am I doing wrong? If I #include <iostream.h> I can

void main(void){
  int a = 123;
  cout << a;
  }                

and 123 gets printed to the screen.

but if I try:                      or:  

void main(void){                   void main(void){
  char str[6];
                                     cout << "Uga Buga";
  str = "Uga Buga";                  }
  cout << str;
  }

in both cases I get linker error "undef symbol in ostream:: etc."
This must be something very stupid and elementary, but I can't 
get it working. Thanks.

Sandy