what to do with unused array elements

Hello,

I have some arrays in my code which will contain different messages of varying lengths, so I have sized my arrays to take the longest ones (plus 1 or two elements on the end), but how do I ensure that if the message is shorter than maximum, there is not junk in the unused elements which would be sent out my serial port?

Thanks
Dave

before filling the value in your array just

Code:

memset(array, 0,  sizeof(size) * MAX_NUMBER)

and initailize your array like

Code:

array[MAX_NUMBER] = {0}

The third argument to memset is computed like (sizeof(array[0]) * MAX_NUMBER), because the function expects a number of bytes.

Thanks for that info Rocky, that sounds like just what I need. Just to clarify, I invoke this function when I am declaring my arrays? Also, can I insert this code into a struct member declaration, or would I have to declare my arrays separately first?

--dave

You are most welcome Enjoy C/C++ programming