I have this error in my C++ code, please help me provide it or fix it for me please. Don't copy another one and paste it to answer me because it won't help me at all!!

This is the requirement of the work:

' ' Code Description D abr E0028 expression must have a constant value D abr E0028 expression must have a constant value D abr E0028 expression must have a constant value 1 abr E0028 expression must have a constant value D abr E0028 expression must have a constant value A matrix is a two-dimensional structure often found in mathematics. For example, a 43 matrix (which has four rows and three columns) might look like this: The file that stores this array would be 41.28.81423772515044115 where we provide the dimensions at the beginning of the file. The program can then open the file, read the first two values, create an appropriate two-dimensional array, and then read the contents of the file into that array. Two matrices can be added if their dimensionality is the same. For example, the above matrix could only be added to another 43 matrix. To perform matrix addition, sum the values in each location to produce the resulting matrix. Write a program that prompts the user for the two file names, each containing one matrix. Read the two matrices into two-dimensional arrays and display them. If the dimensionality is the same, compute and display the sum of the two matrices; if not, display an error message