simple c++ practice by using cmake and building with .so
[USAGE] for hello world:
./app
[USAGE] for both matrix in same size:
./app [size]
[USAGE] for 2 matrix in diffrence size:
./app [m1_size] [m2_size]
[USAGE] for 2 matrix in diffrence row and col, which m1_col should equel to m2_row:
./app [m1_row] [m1_col] [m2_row] [m2_col]