ode_exp.c with h = 0.25 
reached x=2.75, y=15.6415, error=-0.00113763 

ode_exp.c with h = 0.125 
reached x=4.75, y=115.583, error=-0.00100665 

ode_exp.c with h = 0.0625 
reached x=7.125, y=1242.65, error=-0.00106873 

ode_exp.c with h = 0.03125 
reached x=9.53125, y=13783.8, error=-0.00101726 

ode_exp.c with h = 0.015625 
reached x=12.0469, y=170566, error=-0.00100742 

ode_exp.c with h = 0.0078125 
reached x=14.6172, y=2.22928e+06, error=-0.00100503 

ode_exp.c with h = 0.00390625 
reached x=17.2188, y=3.00613e+07, error=-0.00100107 

ode_exp.c with h = 0.00195312 
reached x=19.8477, y=4.16608e+08, error=-0.00100183 

ode_exp.c with h = 0.000976562 
reached x=22.3896, y=5.29299e+09, error=-0.0010004 

ode_exp.c with h = 0.000488281 
reached x=27.0054, y=5.34914e+11, error=-0.0010376 

ode_exp.c with h = 0.000244141 
reached x=24.614, y=4.89475e+10, error=-0.00100708 

ode_exp.c with h = 0.00012207 
reached x=24.2213, y=3.30509e+10, error=-0.00100327 

ode_exp.c with h = 6.10352e-05 
reached x=24.8884, y=6.44031e+10, error=0.00100708 

ode_exp.c with h = 3.05176e-05 
reached x=23.7408, y=2.04417e+10, error=0.00100327 

ode_exp.c with h = 1.52588e-05 
reached x=24.5635, y=4.65346e+10, error=0.00100708 

ode_exp.c with h = 7.62939e-06 
reached x=24.2528, y=3.41073e+10, error=0.00100327 

ode_exp.c with h = 3.8147e-06 
reached x=23.5073, y=1.6184e+10, error=0.00100136 

ode_exp.c with h = 1.90735e-06 
reached x=22.4574, y=5.66417e+09, error=0.0010004