>> midpt0

 Subinervals  Composite Midpoint       Error 
 n =  10       I_M = 6.33805120     E_M =  2.4e-02 
 n =  20       I_M = 6.35588532     E_M =  6.0e-03 
 n =  40       I_M = 6.36035483     E_M =  1.5e-03 
 n =  80       I_M = 6.36147289     E_M =  3.7e-04 
 n =  160       I_M = 6.36175245     E_M =  9.3e-05 
 n =  320       I_M = 6.36182234     E_M =  2.3e-05 

>>