function Quarter(x,y:real):byte;
begin
if(x>0)and(y>0) then Quarter:=1
else if(x<0)and(y>0) then Quarter:=2
else if(x<0)and(y<0) then Quarter:=3
else if(x>0)and(y>0) then Quarter:=4;
end;
function Quarter(x,y:real):byte;
begin
if(x>0)and(y>0) then Quarter:=1
else if(x<0)and(y>0) then Quarter:=2
else if(x<0)and(y<0) then Quarter:=3
else if(x>0)and(y>0) then Quarter:=4;
end;