dynamic 2d-array

Hi All,

While running the below code i am getting
Error like :-

In member function ‘void Matrix::get_element(int, int, int)’:
cons_2d_array.cpp:13:9: error: invalid types ‘int[int]’ for array subscript
cons_2d_array.cpp: In member function ‘int& Matrix: put_element(int, int)’:
cons_2d_array.cpp:16:23: error: invalid types ‘int[int]’ for array subscript
cons_2d_array.cpp: In constructor ‘Matrix::Matrix(int, int)’:
cons_2d_array.cpp:23:18: error: cannot convert ‘int**’ to ‘int*’ in assignment
cons_2d_array.cpp:25:28: error: invalid conversion from ‘int*’ to ‘int’ [-fpermissive]

Code:

---



class Matrix
{
        int *p;
        int d1,d2;
    public:
        Matrix()
        {d1=0;d2=0;}
        Matrix(int x,int y);


        void get_element(int i, int j, int value)
        {p[i][j]=value;}


        int & put_element(int i, int j)
        {return p[i][j];}
};


Matrix :: Matrix(const int x, const int y)
{
        d1=x;
        d2=y;
        p = new int *[d1];
        for(int i=0; i<d1; i++)
          p[i]= new int[d2];
}

---

Stop. Have you considered the use of a std::vector instead of manual memory management of a dynamic array?

So, if I want to get the value of an element, I use put_element(), and if I want to set the value I use get_element()?

Assuming this is some exercise (use vectors as laserlight says, if this is real code), your member variable needs to be

Code:

---

        int **p;

---

Thanks for advice.
I am doing R&D with c++ that's why i asked this question.
Please help me to solve this

:) Thanks,
I was really missing this part int **p