This program calculates the product of two different matrices .
The matrix's result dimesion is 'm'rows 'n' columns.
The number of rows 'm' will be divided into 'Num_ROW' and the number of colomns 'n' into 'NUM_COL'.
The matrix result will be devided into (Num_ROW*NUM_COL) sub-matrices.
Each thread calculate the sub matrix according to his id.
gcc produitmatV2.c -pthread -Wall -o produitmatV2
./produitmatV2