A reference is an alias to an object. That is, it is another name for the object, and so access to the object is the same through a reference as it is through the object's variable name. A reference is declared using a & symbol on the reference name and it is initialized and accessed in exactly the same way as a variable:
int i = 42;
int *pi = &i; // pointer to an integer
int& ri1 = i; // reference to a variable
i = 99; // change the integer thru the variable
*pi = 101; // change the integer thru the pointer
ri1 = -1; // change the integer thru the reference
int& ri2 {i}; // another reference to the variable
int j = 1000;
pi = &j; // point to another integerIn this code, a variable is declared and initialized, then a pointer is initialized to point to this data, and a reference is initialized as an alias for the variable. Reference ri1 is initialized with an assignment operator, whereas reference...