There is no "continue" for switch?

What if I want the following:

vector<int> v;

// v is loaded by push_back()

switch( v.size() ) {
case 2:
//do something

case 4:
//somehow delete two element
//and then do the same thing as in case 2

case 6:
//somehow delete two element
//and then do the same thing as in case 4

default:
//...
}


I thought using "continue" to implement this but got this:

 continue statement not within a loop