declare variable in switch? [duplicate]

This question already has answers here: Closed 12 years ago.

Possible Duplicate:

Why can't variables be declared in a switch statement?

switch (i){
 case 'i': int i; break; } //it works


switch (i){
 case 'i': int i;i=0; break; } //it also works


switch (i){
 case 'i': 开发者_如何学Pythonint i=0; break; } //it ain't

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Dunno the error, but this also works for me in Objective-C (strict superset of C, although I don't believe that ¹) and I do this always, even when I simply return something:

switch (i) {

  case 'i': { // <- curly brackets
    int i = 0; break;
  } // <- curly brackets

}

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^{(1 Because a variable can be named id in C but not in Objective-C)}