CODEWITHSUNDEEP
iosobjective-c
Andrew Smith
Andrew Smith

Reputation: 2929

Objective C++ for loop multiple initialize fails

So I traced a bug in Objective C++ for iOS to this code

    for(int i = (maxBin - 4), max = 0; i <= (maxBin + 3); i++) {  
        max += (fftValLeft[i] * fftValLeft[i]);
    }

The "max = 0;" doesn't happen. I moved the initialization before the loop and all is good now.

This is with Xcode 4.6.3. Is this somehow normal C behavior?

Upvotes: 1

Views: 173

Answers (1)

VJ V&#233;lan Solutions
VJ V&#233;lan Solutions

Reputation: 6564

You are creating a new variable called max whose scope is only visible to the for loop. So once you come out of the loop, max value that you compute inside the loop is not visible outside of it. Hope that helps.

Upvotes: 4

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