import java.util.Scanner;
public class Metod {
int c;
static int toplama(){
int a=0,hesap=0,girdi=0,adet=1,d=0;
Scanner input=new Scanner(System.in);
while (a>=0){
System.out.println("Bir sayı ya da işlem giriniz :");
a= input.nextInt();
girdi=a;
hesap=girdi+hesap;
System.out.println(hesap);
}
return hesap;
}
static int cikarma(){
int a=0,hesap=0,girdi=0,adet=1,d;
Scanner input=new Scanner(System.in);
while(a>=0){
System.out.println("Bir sayı giriniz");
a= input.nextInt();
girdi=a;
hesap=girdi-hesap;
System.out.println(hesap);
}
return hesap;
}
static int carpma(){
int a=0,hesap=1,girdi=0,adet=1;
Scanner input=new Scanner(System.in);
while (a>=0){
a= input.nextInt();
girdi=a;
hesap=girdi*hesap;
System.out.println(hesap);
}
return hesap;
}
static int bolme(){
double a=0,hesap=1,girdi=0,adet=1;
Scanner input=new Scanner(System.in);
while (a>=0) {
a = input.nextInt();
girdi = a;
hesap = girdi / hesap;
System.out.println(hesap);
}
return (int) hesap;
}
public static void main(String[] args){
Scanner input=new Scanner(System.in);
System.out.println("İşlem seciniz");
int c= input.nextInt();
if(c==1){
toplama();
}
else if(c==2){
cikarma();
} else if (c==3) {
carpma();
} else if (c==4) {
bolme();
}
else System.out.print("Hatalı işlem yaptınız");
}
}