Initialise all elements in an array with a value using compound literals

Question

float myArray[myArraySize] = {1};

In the expression above only the first element is init with 1. How can you init all the elements with a value using a compound literals(not memset)?

I'm using GCC 4.2 on unix to compile.

Answer 1

This

float myArray[100] = {[0 ... 99] = 1.0};

is how you do it.

See Designated Initializers in the GCC docs which says:

To initialize a range of elements to the same value, write `[first ... last] = value'.

Answer 2

No, only the first element will be initialized to 1.0. The rest will be initialized, but to 0.0 per the C standard. Have a look at the C faq for some more examples.