//Given that
p1 = 5  //in kg.m/s
d1 = 2.0  //in meter
p2 = 2  //in kg.m/s
d2 = 4.0  //in meter

//Sample Problem 12-4
printf("**Sample Problem 12-4**\n")
L = p1*d1 - p2*d2  //the direction of L2 is opposite to L1
printf("The net angular momentum of the two particle system is %dkg.m/s^2", L)