Initializing char Array with Smaller String Literal

Question

If I write:

char arr[8] = \"abc\";

Is there any specification over what arr[4] might be? I did some tests with Clang and it se

Answer 1

This is standard behavior. Every element of an array that is not explicitly initialized is initialized to a default value ('\0' for char), if any prefix of the array is initialized in the declaration. It also works for other types:

int a[10] = {1};

zeroes out a[1] through a[9].