用matlab实现前向双层神经元BP算法识别三角形，附带随机数据的生成。-Identify the triangle to the double-layer neurons BP algorithm

简单的编队算法，对初学者有帮助，通过matlab仿真可以得到较好的效果，比较简单(Simple formation algorithm is helpful for beginners. Through matlab simulation, better results can be obtained, which is relatively simple.)