Array initialization with {0}, {0,}?

They are equivalent regarding the generated code (at least in optimised builds) because when an array is initialised with {0} syntax, all values that are not explicitly specified are implicitly initialised with 0, and the compiler will know enough to insert a call to memset.

The only difference is thus stylistic. The choice will depend on the coding standard you use, or your personal preferences.

Actually, in C++, I personally recommend:

char myArray[MAX] = {};

They all do the same thing, but I like this one better in C++; it's the most succinct. (Unfortunately this isn't valid in C.)

By the way, do note that char myArray[MAX] = {1}; does not initialize all values to 1! It only initializes the first value to 1, and the rest to zero. Because of this, I recommend you don't write char myArray[MAX] = {0}; as it's a little bit misleading for some people, even though it works correctly.

I think the first solution is best.

char myArray[MAX] = {0};  //best of all