Objective:

Write a program to find.

XA + YB

A. B

Test the program using A= (16, -6, 7), B= (4, 2,-3), X= 2, Y= -5

#include<iostream>

using namespace std;

class Vectors

{

public:

       void GetVectorAB(int x, int y, int A[3], int B[3])

       {

              int XA[3];

              int YB[3];

              int ANS[3]={0};

       int i;

       for(i=0; i<3; i++)

       {

       XA[i]=x*A[i];

       }

       for(i=0; i<3; i++)

       {

       YB[i]=y*B[i];

       }

       for(i=0; i<3; i++)

       {

       ANS[i]=XA[i]+YB[i];

       }

       cout<<"XA+YB=(";

       for(i=0; i<3; i++)

       {

              cout<<ANS[i]<<" ";

       }

       cout<<")"<<endl;

       }

      

       void GetVectorAdotB(int A[3], int B[3])

       {

       int dot[3];

       int ab=0;

       int i;

       for(i=0; i<3; i++)

       {

       dot[i]=A[i]*B[i];

       }

       for(i=0; i<3; i++)

       {

              ab=ab+dot[i];

       }

       cout<<"A.B = "<<ab<<endl;

      

       }

};

void main()

{

       int n;

       Abc:

cout<<"What expression you want to do???"<<endl;

cout<<"1:     XA+YB???"<<endl;

cout<<"2:     A.B????"<<endl;

cin>>n;

if(n==1)

{

       int a,b;

       int A[3]={0};

       int B[3]={0};

       cout<<"Enter vector A"<<endl;

       for(int i=0; i<3; i++)

       {

       cin>>A[i];

       }

       cout<<"Enter vector B"<<endl;

       for(int i=0; i<3; i++)

       {

       cin>>B[i];

       }

       cout<<"Enter a constant value for X"<<endl;

       cin>>a;

       cout<<"Enter a constant value for Y"<<endl;

       cin>>b;

       Vectors v1;

       v1.GetVectorAB(a,b,A,B);

}

else

       if(n==2)

       {

              int A[3];

              int B[3];

              cout<<"Enter vector A"<<endl;

              for(int i=0; i<3; i++)

              {

              cin>>A[i];

              }

              cout<<"Enter vector B"<<endl;

              for(int i=0; i<3; i++)

              {

              cin>>B[i];

              }

              Vectors v2;

              v2.GetVectorAdotB(A,B);

       }

       else

       {

       cout<<"Enter a valid number\n\n";

       goto Abc;

       }

}