说明：  这是一个产生范围在（-255，255）随机数的C函数，其中范围可有自己确定，结果生成一个数据文件，可被其他C程序作为头文件引用，在需要大量测试数据的时候特别有用
(This is a have a range of (-255,255) random number of C functions, the scope of which may have their own identification, the results generate a data file may be other procedures as C header files cited in the need for a large number of test data is particularly useful when)