2.5 reference

1. The reference is an alias. The reference is just another name of the object.

2.

Code:

1. Int ivals = 1024;
2. Int & ref = ival;

3. Define multiple references

Code:

1. Int ival = 1024; iival = 1025;
2. Int & ref1 = ival, & ref2 = iival;

4. A const reference is a reference to a const object.

Code:

1. Const int ival = 1024;
2. Const Int & ref = ival;
3. Int & ref2 = ival; // Error

5.

Code:

1. // Compilation failed
2. Float ivalue = 3.14;
3. Int & Reff = ivalue;
4. // Compilation successful
5. Const float ivalue = 3.14;
6. Const Int & Reff = ivalue;
7. Different types of conditions.

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Code:

1. // Compilation successful
2. Const float ivalue = 3.14;
3. Const Int & Reff = ivalue;

Compiler:

Const int temp = ivalue;

Const Int & Reff = temp;

Ivalue is not modified

 

A const reference can be bound to a different but associated type object or to the right value.