（1）这是一个伪随机数发生器，周期为2 ^ 19937 - 1,可以用于加密

文件说明如下：

mtrand.h包含文件，包含类的声明

mtrand.cpp的库文件包含非内联成员

mttest.cpp小程序来测试随机数发生器

mttest.out输出文件，用于比较

（2）使用

初始化：两种方式，seed(s) 或seed(array, length).

随机数生成：MTRand_int32产生的32位无符号整数。

MTRand产生均匀的双精度浮点数，在halfopen时间间隔[0，1）（32位分辨率）。

MTRand_open产生均匀的双精度浮点数，在开区间（0，1）（32位分辨率）。

MTRand_closed产生均匀的双精度浮点数，在闭区间[0，1]（32位分辨率）。

MTRand53产生均匀的双精度浮点数，在半开区间[0，1）（53位分辨率）。

-(1) This is a pseudo-random number generator, a period of 2 ^ 19937- 1, can be used to encrypt the file descr iption is as follows: mtrand.h include file contains the class declaration mtrand.cpp library file contains non-inline member mttest cpp small program to test the random number generator mttest.out output file for initialization (2): two ways, SEED (s) or seed (array, length) random number generator: MTRand_int32 produce the 32 unsigned integer. MTRand produce uniform double-precision floating-point number, in halfopen time interval [0, 1) (32-bit resolution). MTRand_open produce uniform double-precision floating-point numbers, the open interval (0,1) (32-bit resolution). MTRand_closed produce uniform double-precision floating-point numbers, the closed interval [0, 1] (32-bit resolution). MTRand53 produce uniform double-precision floating-point number, in the half-open interval [0,1) (53-bit resolution).