initialize variable in switch case c 2b 2b

1switch (n)
2{
3    case 1: // code to be executed if n = 1;
4        break;
5    case 2: // code to be executed if n = 2;
6        break;
7    default: // code to be executed if n doesn't match any cases
8}

1#include <iostream>
2using namespace std;
3int main(){
4   int num = 5;
5   switch(num + 2) {
6      case 1: 
7        cout << "Case1: Value is: " << num << endl;
8      case 2: 
9        cout << "Case2: Value is: " << num << endl;
10      case 3: 
11        cout << "Case3: Value is: " << num << endl;
12      default: 
13        cout << "Default: Value is: " << num << endl;
14   }
15   return 0;
16}

1switch (val)
2{   
3case VAL:  
4{
5  // This will work
6  int newVal = 42;  
7  break;
8}
9case ANOTHER_VAL:  
10...
11break;
12}
13