Trả lời:
Uses Crt; Var a, b, kq: Real; Pt: Char;
BEGIN
Clrscr;
Write ('a ='); Readln(a);
Write ('b ='); Readln(b);
Write ('Phep tinh can thuc hien la (+ - * /): ');
Readln(Pt);
If Pt = '+’ Then kq := a + b;
If Pt = '-’ Then kq := a - b;
If Pt = '*’ Then kq := a * b;
If Pt = '/’ Then kq := a / b;
Write (a, pt, b, '=', kq);
Readln;
END.