自己写的BP神经网络，代码是很基础的，输入输出部分代码需要自己修改，有写得不好的地方请留言给我，代码仅供参考，不保证绝对正确-Write a BP neural network, the code is based, input-output part of the code needs to make changes to it, have written a bad place to please leave me a code for information purposes only, does not guarantee absolutely right