C + + references and symbols "&"

First, & means:

1. Take the address symbol, this time it is used in front of the data, such as int a=&b;

2.c++ also uses & as the reference, if you confirm that the program is standard C and not C + +, then you can exclude the reference. The reference is also used in front of the data, and it is only used when defining and declaring , such as int &othername=name;

int &a=b; Defined when used on the left side of the equals sign, is a reference. "Equivalent to A is an alias of B"

int *a=&b; On the right side of the equals sign, and before the data alone, is the address.

int a= (&B) & 0xFFFF; The first & is the in-memory address for B, the second & is bitwise-and, that is, the low 16 bits of the reserved B address value, and the high 16-bit value is cleared 0 (under 32-bit processor).

In fact, the reference is bound to a variable or constant, and once the binding is immutable, it must be initialized when using a reference, and the non-const reference is not directly bound literal value is a number, can only be bound by a variable .

C + + references and symbols "&"