What are some methods to declare a reference in C++ other than type &var=var?

Question

eg:

//The standard method
int x=10;
int &y=x;

I tried

int &y;
y=x;

It didn't work, I am looking for another way to run it.

A reference **must** be initialized (for other types it's highly recommended). — πάντα ῥεῖ, Feb 15 '15 at 17:20
Well, `int &y{x}; int &y(x); std::add_lvalue_reference_t y = x;`. What do you *really* want? — T.C., Feb 15 '15 at 17:30

score 0 · Answer 1 · answered Feb 15 '15 at 17:28

0

You can't declare a reference without initialising it. Maybe what you want is a pointer.

answered Feb 15 '15 at 17:28

swang

score 0 · Accepted Answer · answered Feb 15 '15 at 18:28

There are 2 types of reference:

rvalue - refer to persistent objects whose value you want to change lvalue - refer to temporary objects whose value you want to change

lvalue Example:

int num = 1;
int& r1 {num};
int& r2; // error: need initialization
int& r2 = num;
int* p = &num;
int& r3 = *p;

rvalue Example:

int&& rr1{ int() }; // temporary
int&& rr2{ 2 }; // temporary

2 Answers2