zeroing out memory

Question

gcc 4.4.4 C89

I am just wondering what most C programmers do when they want to zero out memory.

For example, I have a buffer of 1024 bytes. Sometimes I do this:<

Answer 1

I also use memset(buffer, 0, sizeof(buffer));

The risk of not using it is that there is no guarantee that the buffer you are using is completely empty, there might be garbage which may lead to unpredictable behavior.

Always memset-ing to 0 after malloc, is a very good practice.