Labels:book | crt screen | reckoner OCR: Things t0 Remember 499 It is illegal to use the address operator, & with the name ofa register variable Different implementations ofC might impose restrictions on the number and type of regi ster variables allowed Local variables are declared inside function or block. They can only be accessed in that function or block and are unknown outside Global (external) variables are declared outside function blocks and can be referenced by any function in the file that occurs after the declaration of the variable. If a local variable in a function has the same name as a global variable all ref erences to that name will access the local variable side effect produced when function modifies the value ofa global variable Side effects should be kept to minimum and clearly documented with comments source ...
