Difference of Call By Value, Call By Reference, Address

#include<iostream>
using namespace std;

void cbv(int, int);
void cbr(int&, int&);
void cba(int*, int*);



int main()
{
    cout << "ROUND 1:\n";
    int a = 1, b = 2;
    cout << "\ta and b in main() at first:\n\ta=" << a << "\tb=" << b << "\n\t" << &a << '\t' << &b << "\n\n";
    cbv(a, b);
    cout << "\ta and b in main() after Call By Value\n\ta=" << a << "\tb=" << b << "\n\t" << &a << '\t' << &b << "\n\n";

    cout << "ROUND 2:\n";
    a = 1;
    b = 2;
    cout << "\ta and b in main() at first:\n\ta=" << a << "\tb=" << b << "\n\t" << &a << '\t' << &b << "\n\n";
    cbr(a, b);
    cout << "\ta and b in main() after Call By Reference\n\ta=" << a << "\tb=" << b << "\n\t" << &a << '\t' << &b << "\n\n";

    cout << "ROUND 3:\n";
    a = 1;
    b = 2;
    cout << "\ta and b in main() at first:\n\ta=" << a << "\tb=" << b <<"\n\t"<<&a<<'\t'<<&b<< "\n\n";
    cba(&a, &b);
    cout << "\ta and b in main() after Call By Address\n\ta=" << a << "\tb=" << b << "\n\t" << &a << '\t' << &b << "\n\n";
}

void cbv(int i, int j)
{
    int temp = i;
    i = j;
    j = temp;
    cout << "\tin CallByValue()\n\ti=" << i << "\tj=" << j << "\n\t" << &i << '\t' << &j << "\n\n";
}
void cbr(int &i, int &j)
{
    int temp = i;
    i = j;
    j = temp;
    cout << "\tin CallByReference()\n\ti=" << i << "\tj=" << j << "\n\t" << &i << '\t' << &j << "\n\n";
}
void cba(int *i, int *j)
{
    int temp = *i;
    *i = *j;
    *j = temp;
    cout << "\tin CallByAddress()\n\ti=" << *i << "\tj=" << *j << "\n\t" << &i << '\t' << &j <<"\n\t" << i << '\t' << j <<  "\n\n";
}