C++ Programming - References

#include<iostream.h> 
enum xyz
{
    a, b, c
};
int main() 
{
    int x = a, y = b, z = c;
    int &p = x, &q = y, &r = z;
    p = ++x;
    q = ++y;
    r = ++c;
    cout<< p << q << r;
    return 0;
}

#include<iostream.h> 
int main()
{
    int arr[] = {1, 2 ,3, 4, 5}; 
    int &zarr = arr;
    for(int i = 0; i <= 4; i++)
    {
        arr[i] += arr[i];
    }
    for(i = 0; i <= 4; i++)
        cout<< zarr[i]; 
    return 0; 
}

#include<iostream.h> 
struct Bix
{
    short n;
};
int main()
{
    Bix b;
    Bix& rb = b;
    b.n = 5;
    cout << b.n << " " << rb.n << " ";
    rb.n = 8;
    cout << b.n << " " << rb.n;
    return 0; 
}

#include <iostream.h> 
enum xyz 
{
    a, b, c
}; 
int main()
{
    int x = a, y = b, z = c; 
    int &p = x, &q = y, &r = z; 
    p = z; 
    p = ++q;
    q = ++p;
    z = ++q + p++; 
    cout<< p << " " << q << " " << z;
    return 0; 
}

#include<iostream.h> 
int BixFunction(int m)
{
    m *= m;
    return((10)*(m /= m)); 
}
int main()
{
    int c = 9, *d = &c, e;
    int &z = e;
    e = BixFunction(c-- % 3 ? ++*d :(*d *= *d));
    z = z + e / 10;
    cout<< c << " " << e;
    return 0;
}