What is wrong?
import java.io.* ;
public class Avaragerr {
public static void main(String args[]) throws IOException {
BufferedReader xx= new BufferedReader(new InputStreamReader(System.in));
System.out.println("Birinci Sayiyi girin(x)");
String oku= xx.readLine();
System.out.println("Ikinci Sayiyi girin(y)");
String oku2= xx.readLine();
int x = Integer.parseInt(oku);
int y = Integer.parseInt(oku2);
do {
System.out.println("1.Toplama\n2.Cikarma\n3.Carpma\n4.Bolme");
switch(int z) {
case 1: Topla(x,y); break;
case 2: Cikar(x,y); break;
case 3: Carp(x,y);break;
case 4: Bol(x,y);break;
default:
System.out.println("Yanlis Secim!");
}
} while(z>0&&z<5);
}
public static double Topla(int x, int y) {
return (x+y);
}
public static double Cikar(int x, int y) {
return (x-y);
}
public static double Carp(int x, int y) {
return (x*y);
}
public static double Bol(int x, int y) {
return(x/y);
}
}
