94-1.txt

编译原理课程设计大作业PL0文法简易编译器

var head,foot,cock,rabbit,n:integer;
const z=0,kk1=1;
begin
  n := z;
  read(head,foot);
  cock := kk1;
  while cock <= head do
    begin    
      rabbit := head-cock;
      if cock*2+rabbit*4 = foot
      then begin
             write(cock,rabbit);
             n := n+1
           end;
      cock := cock+1
    end;
  if n= 0
  then write(0,0)
end.