uses crt;
var x,y:integer;
{-------------------chuong-trinh-con-tong----------------------------}
function tong(a,b:integer):integer;
begin
tong:=a+b;
end;
{-------------------chuong-trinh-con-hieu----------------------------}
funtion hieu(a,b:integer):integer;
begin
hieu:=a-b;
end;
{-------------------chuong-trinh-con-tich----------------------------}
function tich(a,b:integer):integer;
begin
tich:=a*b;
end;
{-------------------chuong-trinh-con-thuong----------------------------}
function thuong(a,b:integer):real;
begin
thuong:=a/b;
end;
{----------------------chuong-trinh-chinh-----------------------}
begin
clrscr;
write('Nhap x='); readln(x);
write('Nhap y='); readln(y);
writeln('Tong la: ',tong(x,y));
writeln('Hieu la: ',hieu(x,y));
writeln('Tich la: ',tich(x,y));
writeln('Thuong la: ',thuong(x,y):4:2);
readln;
end.
