test5.txt

PL/0语言编译器的实现

const a=45,b=27;
var x,y,g,m;
procedure swap;
var temp;
begin
    temp:=x;
    x:=y;
    y:=temp;
end;
procedure mod;
    x:=x-x/y*y;
begin
    x:=a;y:=b;
    call mod;
    while x#0  
    begin 
        call swap;
        call mod;
    end;
    g:=y;
    m:=a*b/g;
    write(g,m);
end.