Arrays in Expressions
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When an identifier of an array type appears in an expression other than sizeof, address-of (&), or initialization of a reference, it is converted to a pointer to the first array element. For example:
char szError1[] = "Error: Disk drive not ready.";
char *psz = szError1;
The pointer psz points to the first element of the array szError1. Note that arrays, unlike pointers, are not modifiable l-values. Therefore, the following assignment is illegal:
szError1 = psz;