C++ program to calculate the multiplication of two number without using * symbol

#include<iostream>
#include<conio.h>

class myclass
{
    private:
        int a,b,i,res;
    public:
        void input()
        {
            std::cout<<"Enter the value of a = ";
            std::cin>>a;
            std::cout<<"Enter the value of b = ";
            std::cin>>b;
        }

        void mul()
        {
            res = 0;

            for(i=1;i<=b;i++)
                res = res+a;

            std::cout<<"Tne multiplication of two numbers = "<<res;
        }
};

int main()
{
    system("cls");

    myclass c1;
    c1.input();
    c1.mul();

    getch();
    return 0;
}

Enter the value of a = 5
Enter the value of b = 6
The multiplication of two number = 30