In both examples, you are dereferencing an uninitialized pointer, which is undefined behaviour. For the pointer assignment question, ... ... <看更多>

Declare a pointer while assigning its address a value ... In C++ (not in C), you can pass a variable by reference by passing in a variable, and defining the ... ... <看更多>

A null pointer constant, as Karlson's answer correctly states, is either an ... According to the C Standard, if you assign zero to a pointer it will be ... ... <看更多>