CODEWITHSUNDEEP
cundefined-behavior
Jack
Jack

Reputation: 16724

Is this an undefined behavior?

Is this the below C code an UB? can I access garbage value? if so,can static function make it working fine?

const char *foo_name(int x){
    switch(x) {
       case FOO: return "foo";
       case BAA: return "baa";
       default: return "unknow";
    }
}

I'm a bit confused if printf("%s\n",foo_name(FOO)); is ok according to C std.

Upvotes: 0

Views: 107

Answers (2)

user529758
user529758

Reputation:

No UB here. The standard says that string literals have static storage duration.

if so, can static function make it working fine?

For functions, the static modifier means something completely different - it wouldn't solve your (apparently nonexistent) problem.

Upvotes: 3

Praetorian
Praetorian

Reputation: 109249

String literals have static storage duration, which means they exist throughout the lifetime of the program. There's no undefined behavior in your code.

Upvotes: 8

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