This is more of a question, but why is this not allowed?
You would get somthing like:Code:switch ( choice ) { case 1: int x = 5; break; }
In some cases, decalring a new variable within a case structure like the above would erradicate having to delcare the value at the start of the program.main.cpp(85) : error C2360: initialization of 'x' is skipped by 'case' label
Is there any reason why the language does not allow it?
Double Helix STL
Although I don't know why it isn't possible, there's an easy workaround to this.
This is what I do:
Code:switch (choice) { case 1: { int x = 5; break; } }
Originally Posted by Adak
You can declare a new variable before any case statements:
Edit: otherwise you get the interesting case where the variable x is in scope in case 2, but has not been declared and the initializer has therefore been skipped.Code:int main() { int choice; choice = 2; switch (choice) { int x; case 1: x=5; break; case 2: choice++; break; } return 0; }
Thanks guys.
I was unaware of those work-arounds.
Double Helix STL
It is not allowed because otherwise the scope of x would last until the closing brace of the switch. That is, x would be in scope under other case labels too, but it would be possible to get to them with x being defined.
Same thing with goto statement which can't jump over variable definitions.
I might be wrong.
Quoted more than 1000 times (I hope).Thank you, anon. You sure know how to recognize different types of trees from quite a long way away.
Imagine:
If you hit case 2, you use an object which hasn't been constructed. Boom.Code:switch(x) { case 1: SomeClass foo; break; case 2: foo.doSomething(); break; }
