Can a type declaration be made in a Switch statement?

Question

I am using Xcode 4.0.2 for an iOS4 project.

I have a standard switch statement

switch (i) { case 0: int a = 0; break ... } 

This will give me the "Expected Expression" error on int a = 0 ;.

It’s very strange that “Switch” works fine if I precede a type declaration with a simple statement like

 switch (i) { case 0: b = 0; int a = 0; break ... } 

in this case, the compiler does not give an error (only the warning "unused variable a").

How can it be?

Thanks.

Answer 1

Try something like

 switch (i) { case 0: { int a = 0; } break ... } 

Answer 2

Just enclose the case statement in braces:

 switch (i) { case 0: { int a = 0; break; } ... } 

Answer 3

You need to open a new scope with { } to declare new variables:

 switch (i) { case 0: { int a = 0; break; } } 

Answer 4

You can declare type variables

 switch (i) { case 0: { //User brackets int a = 0; } break ... }