hi i need help for this one for c++

1. Write a Matrix class, which represents an mx n matrix of integers (Matrix.h and Matrix.cc). Your class should include the following member functions. Constructor: accepts m and n as parameters and constructs a matrix of the requested size Initializs all entries to 0. Use the defau valuesmn2 . void getDimensions (int , int &n); returns the dimensions of the matrix. atrices). Use assert to . add, subtract: takes one additional Matrix parameter and replace the current element: takes the indics i and j and returns a reference to the element. Also write a version that returns a ensure that the indices are within valid range. constant (for constant A object by the sum/difference of itself and the supplied parameter. Use assert to ensure that the dimensions of the two matrices are compatible. multiply: takes one additional Matrix parameter B and computes the product of the matrix with B. The result is returned as a new Matrix object. Use assert to ensure that the dimensions of the two matrices are compatible. Recall: if A is a p q matrix and B is a q r matrix, their product C is a p XT matrix where each element of C is given by ! . read, write: reads a matrix (dimensions and elements in row-major order) from cin, writes the matrix to cout. 2. Using the Matrix class above, write a program (calc.cc) that (a) Reads in three matrices A, B, and C (b) Sets D to be the same matrix as A except that entries in the first column are 0 (c) Computes and displays the following results: .AxC-A What happens when the matrices have incompatible dimensions for the operations above Type your answer into the file ans.txt