3, matrix, (c) Write a C++ program to perform the following functions: (1) matrix class, define a matrix of class attributes include:  matrix size, lines, rows (rows and columns to represent)  storage matrix array pointer, dynamic application (new) according to the size of the matrix. (2) matrix class method comprising:  constructor parameter is the size of the matrix, dynamic application memory matrix array  destructor release matrix array pointer  copy constructor, and the need to apply for and copy an array The  input from cin input matrix elements  output, the the matrix formatted output to cout Function  matrix sum, the sum of two matrices, and the results are stored in another matrix class, but must be the same as the size of the matrix  matrix function subtraction, subtract two matrices, and save the results in another matrix class, but it must be the same as the size of the matrix. (3) d

matrix.cpp

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