Simple example of vector addition , subtraction and multiplication

VectorAddMultSub.cpp

#include<iostream>
#include<stdlib.h>
using namespace std;
class Vector
{
    int a,b,c;
public:
    Vector(int x,int y,int z)
    {
        a=x;
        b=y;
        c=z;
    }
    Vector sum(Vector o4)
    {
        Vector o5(0,0,0);
        o5.a=a+o4.a;
        o5.b=b+o4.b;
        o5.c=c+o4.c;
        cout<<"Sum of two Vector:\t";
        o5.display();

    }
    Vector sub(Vector o6)
    {
        Vector o7(0,0,0);
        o7.a=a-o6.a;
        o7.b=b-o6.b;
        o7.c=c-o6.c;
        cout<<"Subtraction of two Vector:\t";
        o7.display();


    }
    Vector multi(Vector o8)
    {
        Vector o9(0,0,0);
        o9.a=a*o8.a;
        o9.b=b*o8.b;
        o9.c=c*o8.c;
        cout<<"Multiplication of two Vector:\t";
        o9.display();

    }
    Vector scale_multi(int sc)
    {
        Vector o10(0,0,0);
        o10.a=a*sc;
        o10.b=b*sc;
        o10.c=c*sc;
        cout<<"Scaler Multiplication of two Vector:\t";
        o10.display();
    }
    void display()
    {
        cout<<a<<"i"<<"\t"<<b<<"j"<<"\t"<<c<<"k";
    }

};
int main()
{
    int sc;
    Vector o1(1,2,3),o2(2,3,1),o3(0,0,0);

    o1.sum(o2);
    cout<<"\n";
    o1.sub(o2);
    cout<<"\n";
    o1.multi(o2);
    cout<<"\n";
    cout<<"Enter the scaler vector:";
    cin>>sc;
    o1.scale_multi(sc);

}