C++ please

(Markov matrix)

An n by n matrix is called a positive Markov matrix if each element is positive and the sum of the elements in each column is 1. Write the following function to check whether a matrix is a Markov matrix.

const int SIZE = 3; bool isMarkovMatrix(const double m[][SIZE]); 

Write a test program that prompts the user to enter a 3 by 3 matrix of double values and tests whether it is a Markov matrix. Here are sample runs:

Sample Run 1

Enter a 3-by-3 matrix row by row: 0.15 0.875 0.375 0.55 0.005 0.225 0.30 0.12 0.4 It is a Markov matrix 

Sample Run 2

Enter a 3-by-3 matrix row by row: 0.95 -0.875 0.375 0.65 0.005 0.225 0.30 0.22 -0.4 It is not a Markov matrix