package odczytywanie;
import java.util.Scanner;
public class Odczytywanie {
public static void main
(String[] args
) {
double a;
double b;
Scanner podaj
= new Scanner
(System.
in);
Scanner wybor
= new Scanner
(System.
in);
kalkulator dzialania = new kalkulator();
System.
out.
println("Co chcesz zrobić? 1. Dodawanie 2. Odejmowanie");
int wybor_1 = wybor.nextInt();
while (wybor_1 >= 3) {
if (wybor_1 >= 3) {
System.
out.
println("Nie ma takiej opcji, wybierz ponownie");
System.
out.
println("Co chcesz zrobić? 1. Dodawanie 2. Odejmowanie");
wybor_1 = wybor.nextInt();
} else {
switch (wybor_1) {
case 1:
System.
out.
println("Podaj pierwsza liczbę:");
a = podaj.nextInt();
System.
out.
println("Podaj drugą liczbę");
b = podaj.nextInt();
System.
out.
println("Wynik to: " + dzialania.
dodaj(a, b
));
break;
case 2:
System.
out.
println("Podaj pierwsza liczbę:");
a = podaj.nextDouble();
System.
out.
println("Podaj drugą liczbę");
b = podaj.nextDouble();
System.
out.
println("Wynik to: " + dzialania.
odejmij(a, b
));
break;
}
}
}
switch (wybor_1) {
case 1:
System.
out.
println("Podaj pierwsza liczbę:");
a = podaj.nextInt();
System.
out.
println("Podaj drugą liczbę");
b = podaj.nextInt();
System.
out.
println("Wynik to: " + dzialania.
dodaj(a, b
));
break;
case 2:
System.
out.
println("Podaj pierwsza liczbę:");
a = podaj.nextDouble();
System.
out.
println("Podaj drugą liczbę");
b = podaj.nextDouble();
System.
out.
println("Wynik to: " + dzialania.
odejmij(a, b
));
break;
}
}
public static class kalkulator {
public double dodaj(double a, double b) {
return a + b;
}
public double odejmij(double a, double b) {
return a - b;
}
}
}
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