tut58.cpp

#include<iostream>
using namespace std;

template <class T>
class vector{
    public:
        T * arr;
        int size;
            vector(int m){
                size = m;
                arr = new T[size];
            }
            T product(vector &v){
                T d = 0;
                for ( int i = 0; i < size; i++)
                {
                    d += this->arr[i] * v.arr[i];
                }
                return d;
                
            }
};
int main(){
    vector <float>v1(3);
    v1.arr[0] = 4;
    v1.arr[1] = 3;
    v1.arr[2] = 2;
    v1.arr[3] = 1;

    vector <float>v2(3);
    v2.arr[0] = 1;
    v2.arr[1] = 2;
    v2.arr[2] = 1;
    v2.arr[3] = 0;

    float a = v1.product(v2);
    cout<<a<<endl;

    return 0;
}