The program determ_f.exe use input data from files named determ?.dat
where ? is the placeholder of a number 0-9 or a letter.
The structure of input data is obvious.

A test example: input data in the file determb.dat, a matrix 3x3
Starting the program appears the prompt asking the character 
identifying the input data. In our case b.

seria=
b<ENTER>


The next prompt ask for the size of the input matrix

 ** N
3<ENTER>

The output is the file determb.txt containing the input data 
and the results.





