Question

Write a C++ program and algorithm having two classes for determining a dot product and cross product of two vectors. Also find the angle between the vectors. Each vector size is 3D (x, y and z coordinates).

Answer 1

  #include <bits/stdc++.h>
#define n 3
using namespace std;
int dotproduct(int vector_A[], int vector_B[])      // dot product of two vector array.
{
    int product = 0;
    for (int i = 0; i < n; i++)               // Loop for calculate dot product
        product = product + vector_A[i] * vector_B[i];
    return product;
}
void crossproduct(int vector_A[], int vector_B[], int cross_product[])       // cross product of two vector array.
{
    cross_product[0] = vector_A[1] vector_B[2] - vector_A[2] vector_B[1];
    cross_product[1] = vector_A[0] vector_B[2] - vector_A[2] vector_B[0];
    cross_product[2] = vector_A[0] vector_B[1] - vector_A[1] vector_B[0];
}
int main()
{
    int vector_A[] = { 2,3,4};
    int vector_B[] = { 5,6,7};
    int cross_product[n];
    cout << "Dot product:";
    cout << dotproduct(vector_A, vector_B) << endl;          // dotProduct function call
    cout << "Cross product:";
    crossproduct(vector_A, vector_B, cross_product);        // crossProduct function call
    for (int i = 0; i < n; i++)
                                cout << cross_product[i] << " "; // cross product of two vector array.
    return 0;
}

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