// A program that prints the outer product of two vectors.
//Task: Generalize the given code to take a user input of 2 vectors and prints the matrix formed by them (the outer product) of these two vectors.
#include <iostream>
using namespace std;


int main ()
{
 // double A= {{5, 10 },{2, 4}};
  /* intialization of vector: */
  double vec1 [2]  = {1,2} ;
  double vec2 [2]  = {3,4} ;
  
 unsigned int size_v1 = 2;
 unsigned int size_v2 = 2;
 
 double A[size_v1][size_v2] ; //notice no initialization!
 
 for (unsigned int i =0 ; i < size_v1 ; ++i) 
     {
     for (unsigned int j =0 ; j < size_v2; ++j) 
         {
	A[i][j] = vec1[i]*vec2[j];
	cout << " \t A["<<i<<"]"<<"["<<j<<"] = " << A[i][j] ;
          }//for-j
      cout <<endl; //notice the way to display the matrix entries!
      }//for-i
 return 0;
}