C++ challenge switch and arrays

Question

Hi there. I found this question as a challenge and I don't get the output...

int x[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
for (int y : x) {
switch(y) {
case 1: cout << "C";
case 3: cout << "P";
case 7: cout << "P";
case 8: cout << "!";
}
}

Output is: CPP!PP!P!!

But why? My solution would be CPP! I just don't get it...

Answer 1

For every number 'y' in array x, the complete switch is gone through.

So for 1, it's 'CPP!', because the breaks are missing ('fall-through').

2 is ignored since there is no case 2.

3 starts with case 3 and falls through from there: 'PP!'

And so on.

Answer 2

Thanks!