f0816.cpp

it is a usefull thing

//=====================================
// f0816.cpp
// friend function accessing class member
//=====================================
#include"myvector.h"
#include"mymatrix.h"
#include<iostream>
#include<fstream>
using namespace std;
//-------------------------------------
int main(){
  ifstream in("in.txt");
  int x,y;  in>>x>>y;
  Matrix ma;
  ma.set(x,y);
  for(int i=0; i<x; ++i)
  for(int j=0; j<y; ++j)
    in>>ma.elem(i,j);
  in>>x;
  Vector ve;
  ve.set(x);
  for(int i=0; i<x; ++i)
    in>>ve[i];
  Vector vx = multiply(ma, ve);
  vx.display();
  vx.remove();
  ve.remove();
  ma.remove();
}//====================================