references.cpp

#include <stdio.h>
#include <iostream>
using namespace std;

int main()
{
    int a = 3;
    int b = 4;
    int* pointerToA = &a;
    int* pointerToB = &b;
    int* p = pointerToA;
    p = pointerToB;
    printf("%d %d %d\n", a, b, *p); // Prints 3 4 4
    int& referenceToA = a;
    int& referenceToB = b;
    int& r = referenceToA;
    cout<<"&referenceToA:"<<&referenceToA<<",&a:"<<&a<<",&referenceToB:"<<&referenceToB<<",&b:"<<&b<<",&r:"<<&r<<",r:"<<r<<endl;
    r = referenceToB;
    
    cout<<"&referenceToA:"<<&referenceToA<<",&a:"<<&a<<",&referenceToB:"<<&referenceToB<<",&b:"<<&b<<",&r:"<<&r<<",r:"<<r<<endl;
    
    referenceToA = referenceToB;
    cout<<"&referenceToA:"<<&referenceToA<<",&a:"<<&a<<",&referenceToB:"<<&referenceToB<<",&b:"<<&b<<",&r:"<<&r<<",r:"<<r<<endl;
    
    //cannot declare pointer to 'int&'
    //int& *pointerToReferenceToA = &referenceToA;
    //cout<<"pointerToReferenceToA:"<<pointerToReferenceToA<<"*pointerToReferenceToA:"<<*pointerToReferenceToA<<endl;
    
    //invalid initialization of reference of type 'int&' from expression of type 'int*'
    //int& referenceToPointer = pointerToA;
    
    
    
    return 0;
}