Mình dùng theo kiểu file nè:
Program BTH;
var a,b,c:longint;
t:text;
Procedure init;
Begin
assign(t,'tinht.inp');reset(t);
readln(t,a,b);
close(t);
end;
procedure timize;
begin
c:=a+b;
end;
Procedure print;
begin
assign(t,'tinht.out');rewrite(t);
write(t,c);
close(t);
end;
begin
init;
timize;
print;
end.