c 2b 2b switch multiple cases

1#include <iostream> 
2using namespace std; 
3  
4int main() { 
5    // variable declaration 
6	int input;
7	switch(input){
8	case 1: case 2: case 3: case 4:
9		//executes if input is 1, 2, 3, or 4
10		break;
11	case 5: case 6: case 7:
12		//executes if input is 5, 6, or 7
13        break;
14	default:
15		//executes if input isn't any of the cases
16    }
17    return 0; 
18}