C++ Template beginner example

C++ Template basic example

Here I am saving my source code so that I can revise my old topics and I  will be able to see my  progress that how I am increasing my capacity day by day,,,.

I know that its a example that harry bhai took in his course;

but I have coded it after watching his video.(don't spam);

 #include<iostream>

using namespace std;

template <class T>

class vector{

    public:

        T *arr;

        int size;

        vector(int m)

        {

            size = m;

            arr = new T[size];

        }

        int dotProduct(vector &v){

            T d =0;

            for(int i = 0; i<size; i++){

                d+= this->arr[i]*v.arr[i];

            }

            return d;

        }

};

int main(){

    vector<int> v1(3);

    v1.arr[0] = 4;

    v1.arr[1] = 3;

    v1.arr[2] = 1;

    vector<int> v2(3);

    v2.arr[0] = 1;

    v2.arr[1] = 0;

    v2.arr[2] = 1;

    int a = v1.dotProduct(v2);

    cout<<a<<endl;

    return 0;

}

//without writing the template and we can use only int numbers so we use to make,

//template so that I can use any type of data types like float double and long double as well.

// Here I thought my own example;

//Here I may have made spelling mistake please ignore it kindly

//please undestand my feel;

#include<iostream>

using namespace std;

template <class T = int, class T1 = int>

class claculator{

    private:

        T a;

        T1 b;

    public:

   

    void add(T x, T1 y){

        a = x;

        b = y;

        cout<<"The sum is "<<a+b<<endl;

    }

   

    void multiply(T, T1);

};

template <class T, class T1>

void claculator<T, T1>:: multiply(T x, T1 y){

    a = x;

    b = y;

    printf("The multiplication is ");

    cout<<a*b;

};

int main(){

    claculator<>c1;

    c1.add(12, 34);

    c1.multiply(2, 4);

    return 0;

}