Prog : lecture des données
 X= 1.  Y= 0.766308665
 S= 5.84922218
 SP1 : CTL= 99  xout= 5.26630878
 B(2,2)= -0.302659601  B(N,M)= 2.
 Select case : X= 1.
 A(2,2)= -0.605319202  A(N,N)= 4.
 S= 221.986237
 S= 221.986237  K= 1
 BR(1,1,1,1)= 0.860065699
 B(2,2)= 7.14000034  B(N,N)= 19.1399994
 MATMUL : A(1,1)= 223.976746  A(N,M)= 392.122009  A(2,2)= 245.755661  A(2,3)= 245.755661