HELP:Euler Equations with some initial data !
 

I use WENO-5 with 3 order Runge-Kutta method to solve the Euler system of 3 equations.

When I take the initial value as x<0:(1.0 , 0.0 , 2.5) ; x>0:(0.2 , 1.5 , 1.25), the program produces wrong information.

Does anybody know the reason? And may you present some advance about the programming of this problem?

Thanks in advance!