c++ hesap makinesinde yardım

#include <iostream>
using namespace std;

main() {
       
       int x;
       cout << "Birinci sayiyi giriniz";
       cin >> x;
       
       int y;
       cout << "İkinci sayiyi giriniz";
       cin >> y;
       
       int z;
       cout << "İsleminizi seciniz -\n Toplama -\n Cikarma -\n Carpma -\n Bolme"
       
       switch(z) {
	   
                
                case 1: {
                cout << x+y;
                }
                break;
                
                case 2: {
                cout << x-y;
                }
                break;
                
                case 3: {
                cout << x*y;
                }
                break;
                
                case 4: {
                cout << x/y;
                }
                break;
                default: {
                         cout << "Hata.";}
                
                }
                
       
       
       
       }

#include <iostream> 
 using namespace std; 
  
 main() { 
  
 int x; 
 cout << "Birinci sayiyi giriniz:"; 
 cin >> x; 
  
 int y; 
 cout << "İkinci sayiyi giriniz:"; 
 cin >> y; 
  
 int z; 
 cout << "İsleminizi seciniz: \n 1-Toplama\n 2-Cikarma \n 3-Carpma \n 4-Bolme"; 
 cin >> z; 
  
 switch (z) { 
  
 case 1: { 
 	cout << x+y; 
 	break; 
 } 
  
 case 2: { 
 	cout << x-y; 
 	break; 
 } 
  
 case 3: { 
 	cout << x*y; 
 	break; 
 } 
  
 case 4: { 
 	cout << x/y; 
 	break; 
 } 
 default: { 
 	cout << "Hata"; 
 	break; 
 } 
  
  
  
 } 
  
  
  
  
  
  
 }