将Numpy数组传递给C函数进行输入和输出

只需将所有四个参数传递给C函数。从以下位置更改Python代码：

fun(ctypes.c_void_p(indata.ctypes.data), ctypes.c_void_p(outdata.ctypes.data))

至：

fun(ctypes.c_void_p(indata.ctypes.data), ctypes.c_int(5), ctypes.c_int(6),    ctypes.c_void_p(outdata.ctypes.data))