How to check integer overflow in C?

Posted by Ganker on Stack Overflow See other posts from Stack Overflow or by Ganker
Published on 2010-04-13T22:31:58Z Indexed on 2010/04/13 22:43 UTC
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integer-overflow

There's (1):

// assume x,y are non-negative
if(x > max - y) error;

And (2):

// assume x,y are non-negative
int sum = x + y;
if(sum < x || sum < y) error;

Whichs is preferred or is there a better way.

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How to check integer overflow in C?

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