vectorOperatorOverload.cpp

#include <iostream>

using namespace std;

const int size = 5;

class vector
{
    int v[size];
public:
    vector()
    {
        for(int i=0;i<size;i++)
            v[i] = 0;
    }
    vector(int *x)
    {
        for(int i=0;i<size;i++)
            v[i] = x[i];
    }

    friend vector operator *(int a, vector b);
    friend vector operator *(vector b, int a);
    friend istream& operator >> (istream&, vector&);
    friend ostream& operator << (ostream&, vector&);
};

vector operator *(int a, vector b)
{
    vector c;
    for(int i=0;i<size;i++)
        c.v[i] = a * b.v[i];
    return c;
}

vector operator *(vector b, int a)
{
    vector c;
    for(int i=0;i<size;i++)
        c.v[i] = b.v[i] * a;
    return c;
}

istream& operator >>(istream& din, vector& b)
{
    for(int i=0;i<size;i++)
        din >> b.v[i];
    return din;
}

ostream& operator <<(ostream& dout, vector& b)
{
    for(int i=0;i<size;i++)
        dout << b.v[i] << "\t";
    return dout;
}

int x[size] = {2,4,5,6,7};

int main()
{
    vector m;
    vector n=x;
    cout << "enter elemnts of m: " ;
    cin >> m;
    cout << "m: " << m << endl;
    vector p,q;
    p = 2*m;
    q = n*2;
    cout << "p: " << p << endl;
    cout << "q: " << q;

    return 0;
}