a=5; b=3; printf( "%d=Z(%d)", a, b );
a=5; b=3; printf( "a,=Z(%d)", b );
a=5; b=3; printf ( "Z(a)=(b)" );
a=5; b=3; printf ( "Z(%d)=(%d)", a, a+b );
5+3=?
Z(5)=F(3)
a=5;b=3;