Memset why int

The third argument of memset is byte size. So you should set total byte size of arr[15]. However probably, you should want to set value 1 to whole elements in arr. Then you've better to set in the loop. Python Javascript Linux Cheat sheet Contact. You must not use constant value 8, you've better to use count of element size.

When calling memset arr, 1, 4 , it become 0x01 0x01 0x01 0x But your expected is 0x00 0x00 0x00 0x This is depend on your CPU archtecture. As I wrote in above, you shouldn't use memset if you want to set value 1 each elements not set 1 each bytes. Show 1 more comment. Since nobody mentioned it You're technically correct, but if I saw that in a code review, I would probably lose it.

This will only work on platforms using 2's-complement for representing negative numbers. Even though virtually every platform today is 2's -complement, this is still a hack. AnT AnT k 39 39 gold badges silver badges bronze badges. Himanshu Singhvi Himanshu Singhvi 31 1 1 bronze badge. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

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Question feed. Stack Overflow works best with JavaScript enabled. But after C89, function declaration becomes a must, so memset it must be the first statement came out, this time to take care of existing code, such as. Character constants e. Tech Community Register Log in. Why memset second argument does not replace int to char.