Answer to Question #193475 in C++ for Aduu

Question

Create a class vector with array a[n] and calculate v2=v1*5 and v3=4*v1. Use friend function in overloading operators.

Answer 1

#include<bits/stdc++.h>
using namespace std;
class Vector
{   int x,y,z;
public:
    Vector(int x, int y, int z)
    {
        // Constructor
        this->x = x;
        this->y = y;
        this->z = z;
    }
    Vector(const Vector &p1)
    {
        x = p1.x;
        y = p1.y;
        z = p1.z;
    }
    friend Vector operator *(Vector v2,int n)
    {
        int x1,y1,z1;
        x1=v2.x*n;
        y1=v2.y*n;
        z1=v2.z*n;
        return Vector(x1,y1,z1);
    }
    friend Vector operator *(int n, Vector v2)
    {
        int x1,y1,z1;
        x1=v2.x*n;
        y1=v2.y*n;
        z1=v2.z*n;
        return Vector(x1,y1,z1);
    }
    friend ostream& operator<<(ostream& out, const Vector& v)
    {
        out << v.x << "i ";
        if (v.y >= 0)
            out << "+ ";
        out << v.y << "j ";
        if (v.z >= 0)
            out << "+ ";
        out << v.z << "k" << endl;
        return out;
     }
};
int main()
{
    int i,j,k,n;
    cout<<"Enter the elements i,j and k for vector ";
    cin>>i>>j>>k;
    Vector V1(i,j,k);
    cout<<"Enter the value of n ";
    cin>>n;
    Vector V3=(V1*n);
    cout<<"Multiplication by n "<<V3;
    cout<<"Enter the elements i,j and k for vector ";
    cin>>i>>j>>k;
    Vector V2(i,j,k);
    cout<<"Enter the value of n ";
    cin>>n;
    Vector V4=(n*V2);
    cout<<"Multiplication by n "<<V4;
}