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Fill a matrix M of L rows and C columns by random integers less than 10 with L is C multiple of 3
Fill a file called "Somme.dat" which will contain the sum of the boxes of each row (SomL) and the sum of the boxes of each column (SomC)
Fill a text file called "Pgcd.txt" by the pgcd of each file pair "Somme.dat"
Display the prime numbers among them of file "sum.dat"
To calculate the PGCD use a recursive method
We say that two numbers are prime to each other if their PGCD is equal to 1