JS的取随机数，生成0-1范围的浮点数，不含1

ttggnn

感谢分享

萧楚楠

白银大佬的取随机数也挺好用的，分享下

  

子程序名	返回值类型	公开	备 注
MT_Rand	整数型		32位整数，高质量伪随机数 MT算法，不依赖任何CPU 或 特殊指令，干净卫生，放心食用！Code By:白银
参数名	类 型	参考	可空	数组	备 注
min	整数型				可为负数
max	整数型				可为负数

变量名	类 型	静态	数组	备 注
g_p	整数型
p	整数型

' 利用旋转(扭曲)线性反馈移位寄存器(TGFSR)产生随机数， 目前质量最高的伪随机数算法！
' 参考文章： http://www.cppblog.com/Chipset/archive/2009/01/19/72330.html
如果真 (g_p ＝ 0)  ' 多线程安全，不用加锁！
' 放心，这里是多线程安全的，最多也就【最开始】并行的那几条线程，可能会泄露一点点点内存。最多也就几kb也是可以接受的。
' 一开始就被大量并行调用的概率也很小，如果再专门多搞个子程序用来初始化，就不方便使用了~！
' 如有洁癖请自己改造！！！或者程序刚启动的时候，先随便调用一次！
g_p ＝ 申请内存 (2504, 真)
如果真 (g_p ＝ 0)
返回 (min)

p ＝ g_p
置入代码 ({ 96, 131, 120, 8, 0, 15, 132, 224, 0, 0, 0, 185, 1, 0, 0, 0, 246, 64, 4, 1, 117, 250, 135, 72, 4, 133, 201, 117, 243, 129, 56, 112, 2, 0, 0, 116, 91, 139, 16, 255, 0, 139, 76, 144, 8, 199, 64, 4, 0, 0, 0, 0, 137, 200, 193, 233, 11, 49, 193, 137, 200, 37, 173, 88, 58, 255, 193, 224, 7, 49, 193, 137, 200, 37, 140, 223, 255, 255, 193, 224, 15, 49, 193, 137, 200, 193, 232, 18, 49, 200, 139, 77, 12, 139, 93, 8, 57, 217, 124, 20, 41, 217, 65, 49, 210, 247, 241, 137, 208, 1, 216, 137, 68, 36, 28, 97, 201, 194, 8, 0, 139, 77, 8, 139, 93, 12, 235, 228, 49, 246, 139, 125, 252, 87, 85, 131, 199, 8, 137, 253, 187, 141, 1, 0, 0, 70, 137, 242, 49, 192, 129, 254, 112, 2, 0, 0, 15, 68, 208, 139, 84, 149, 0, 51, 23, 129, 226, 255, 255, 255, 127, 51, 23, 137, 208, 209, 232, 137, 193, 129, 241, 223, 176, 8, 153, 128, 226, 1, 15, 68, 200, 49, 210, 129, 251, 112, 2, 0, 0, 15, 68, 218, 137, 218, 51, 76, 149, 0, 137, 15, 141, 127, 4, 67, 129, 251, 141, 1, 0, 0, 117, 179, 93, 88, 199, 0, 0, 0, 0, 0, 233, 58, 255, 255, 255, 100, 139, 13, 32, 0, 0, 0, 100, 161, 44, 0, 0, 0, 100, 15, 175, 13, 36, 0, 0, 0, 131, 209, 0, 100, 51, 5, 48, 0, 0, 0, 51, 77, 252, 247, 225, 17, 194, 139, 93, 252, 131, 195, 8, 137, 19, 49, 192, 137, 209, 193, 233, 30, 49, 209, 105, 209, 101, 137, 7, 108, 64, 1, 194, 137, 20, 131, 61, 111, 2, 0, 0, 114, 230, 233, 70, 255, 255, 255 })
返回 (0)

子程序名	返回值类型	公开	备 注
MT_RandL	长整数型		64位长整数，高质量伪随机数 MT算法，不依赖任何CPU 或 特殊指令，干净卫生，放心食用！Code By:白银
参数名	类 型	参考	可空	数组	备 注
min	长整数型				可为负数
max	长整数型				可为负数

变量名	类 型	静态	数组	备 注
g_p	整数型
p	整数型

' 利用旋转(扭曲)线性反馈移位寄存器(TGFSR)产生随机数， 目前质量最高的伪随机数算法！
如果真 (g_p ＝ 0)  ' 多线程安全，不用加锁！
' 放心，这里是多线程安全的，最多也就【最开始】并行的那几条线程，可能会泄露一点点点内存。最多也就几kb也是可以接受的。
' 一开始就被大量并行调用的概率也很小，如果再专门多搞个子程序用来初始化，就不方便使用了~！
' 如有洁癖请自己改造！！！或者程序刚启动的时候，先随便调用一次！
g_p ＝ 申请内存 (2504, 真)
如果真 (g_p ＝ 0)
返回 (min)

p ＝ g_p
置入代码 ({ 87, 86, 83, 131, 120, 8, 0, 15, 132, 53, 2, 0, 0, 137, 193, 187, 1, 0, 0, 0, 246, 64, 4, 1, 117, 250, 135, 88, 4, 133, 219, 117, 243, 139, 0, 255, 1, 61, 55, 1, 0, 0, 15, 135, 186, 0, 0, 0, 139, 84, 193, 12, 139, 68, 193, 8, 199, 65, 4, 0, 0, 0, 0, 137, 211, 137, 193, 193, 235, 29, 15, 172, 209, 29, 137, 222, 137, 207, 129, 230, 85, 85, 85, 85, 129, 231, 85, 85, 85, 85, 49, 214, 49, 199, 137, 243, 137, 249, 137, 254, 137, 223, 193, 230, 17, 15, 164, 207, 17, 137, 240, 137, 250, 37, 0, 0, 166, 237, 129, 226, 255, 127, 214, 113, 49, 200, 49, 218, 139, 93, 20, 137, 209, 137, 194, 139, 117, 8, 193, 226, 5, 131, 236, 8, 129, 226, 224, 238, 247, 255, 139, 125, 12, 49, 202, 82, 137, 209, 193, 233, 11, 49, 200, 80, 139, 77, 16, 137, 248, 57, 206, 25, 216, 125, 45, 41, 241, 25, 251, 137, 200, 137, 218, 137, 193, 137, 211, 131, 193, 1, 131, 211, 0, 137, 92, 36, 12, 137, 76, 36, 8, 232, 252, 1, 0, 0, 131, 196, 16, 1, 240, 17, 250, 91, 94, 95, 201, 194, 16, 0, 41, 206, 25, 223, 137, 240, 137, 206, 137, 250, 137, 223, 235, 205, 85, 131, 236, 20, 131, 193, 8, 137, 76, 36, 8, 141, 153, 224, 4, 0, 0, 137, 202, 137, 76, 36, 12, 137, 216, 139, 58, 139, 114, 8, 139, 90, 4, 139, 170, 224, 4, 0, 0, 129, 230, 255, 255, 255, 127, 129, 231, 0, 0, 0, 128, 9, 247, 137, 254, 137, 249, 137, 223, 15, 172, 222, 1, 209, 239, 49, 245, 139, 178, 228, 4, 0, 0, 49, 254, 137, 207, 131, 231, 1, 116, 12, 129, 245, 233, 25, 102, 169, 129, 246, 90, 111, 2, 181, 137, 42, 131, 194, 8, 137, 114, 252, 57, 208, 117, 175, 139, 76, 36, 12, 139, 68, 36, 8, 141, 169, 216, 4, 0, 0, 139, 152, 224, 4, 0, 0, 139, 144, 232, 4, 0, 0, 129, 227, 0, 0, 0, 128, 129, 226, 255, 255, 255, 127, 9, 211, 139, 80, 4, 137, 28, 36, 139, 152, 228, 4, 0, 0, 139, 52, 36, 137, 92, 36, 4, 139, 124, 36, 4, 139, 24, 15, 172, 254, 1, 209, 239, 49, 243, 139, 52, 36, 49, 250, 131, 230, 1, 116, 12, 129, 243, 233, 25, 102, 169, 129, 242, 90, 111, 2, 181, 137, 152, 224, 4, 0, 0, 131, 192, 8, 137, 144, 220, 4, 0, 0, 57, 197, 117, 156, 139, 1, 139, 153, 184, 9, 0, 0, 139, 81, 4, 137, 197, 129, 227, 0, 0, 0, 128, 129, 229, 255, 255, 255, 127, 9, 235, 137, 28, 36, 139, 153, 188, 9, 0, 0, 139, 60, 36, 139, 52, 36, 137, 92, 36, 4, 139, 108, 36, 4, 139, 153, 216, 4, 0, 0, 15, 172, 239, 1, 209, 237, 49, 251, 139, 185, 220, 4, 0, 0, 49, 239, 131, 230, 1, 116, 12, 129, 243, 233, 25, 102, 169, 129, 247, 90, 111, 2, 181, 137, 153, 184, 9, 0, 0, 187, 1, 0, 0, 0, 137, 185, 188, 9, 0, 0, 131, 233, 8, 131, 196, 20, 199, 1, 1, 0, 0, 0, 93, 233, 246, 253, 255, 255, 85, 80, 137, 197, 100, 139, 21, 32, 0, 0, 0, 100, 161, 44, 0, 0, 0, 100, 15, 175, 21, 36, 0, 0, 0, 100, 51, 5, 48, 0, 0, 0, 131, 210, 0, 1, 232, 131, 208, 0, 137, 85, 12, 137, 69, 8, 49, 255, 190, 1, 0, 0, 0, 187, 45, 127, 149, 76, 235, 6, 131, 198, 1, 131, 215, 0, 137, 209, 193, 233, 30, 137, 205, 137, 209, 49, 197, 105, 201, 45, 127, 149, 76, 105, 213, 45, 244, 81, 88, 137, 232, 137, 253, 1, 209, 247, 227, 1, 202, 1, 240, 141, 12, 245, 0, 0, 0, 0, 139, 44, 36, 17, 250, 137, 68, 13, 8, 137, 84, 13, 12, 129, 254, 55, 1, 0, 0, 117, 187, 89, 93, 233, 32, 254, 255, 255, 85, 87, 86, 83, 131, 236, 28, 139, 92, 36, 52, 139, 68, 36, 60, 139, 116, 36, 48, 139, 124, 36, 56, 137, 218, 133, 192, 117, 51, 57, 223, 118, 16, 137, 240, 247, 247, 137, 208, 49, 210, 131, 196, 28, 91, 94, 95, 93, 195, 137, 253, 133, 255, 117, 11, 184, 1, 0, 0, 0, 49, 210, 247, 247, 137, 197, 137, 216, 49, 210, 247, 245, 137, 240, 247, 245, 137, 208, 235, 215, 137, 241, 57, 216, 118, 10, 137, 240, 131, 196, 28, 91, 94, 95, 93, 195, 15, 189, 232, 131, 245, 31, 117, 26, 57, 216, 15, 130, 160, 0, 0, 0, 57, 247, 15, 134, 152, 0, 0, 0, 137, 200, 131, 196, 28, 91, 94, 95, 93, 195, 137, 233, 186, 32, 0, 0, 0, 41, 234, 211, 224, 137, 68, 36, 8, 137, 209, 137, 248, 211, 232, 139, 76, 36, 8, 137, 84, 36, 4, 139, 84, 36, 4, 9, 193, 137, 216, 137, 76, 36, 8, 137, 233, 211, 231, 137, 209, 211, 232, 137, 233, 137, 124, 36, 12, 211, 227, 137, 199, 137, 209, 137, 240, 211, 232, 137, 233, 137, 250, 211, 230, 9, 216, 247, 116, 36, 8, 137, 209, 137, 243, 247, 100, 36, 12, 137, 198, 137, 215, 57, 209, 114, 6, 117, 16, 57, 195, 115, 12, 43, 68, 36, 12, 27, 84, 36, 8, 137, 215, 137, 198, 137, 202, 15, 182, 76, 36, 4, 41, 243, 25, 250, 137, 208, 211, 224, 137, 233, 211, 235, 211, 234, 9, 216, 131, 196, 28, 91, 94, 95, 93, 195, 137, 218, 41, 254, 25, 194, 137, 241, 137, 200, 233, 91, 255, 255, 255 })
返回 (0)

i支持库列表	支持库注释
spec	特殊功能支持库

.版本 2<br /> .支持库 spec<br /> <br /> .子程序 MT_Rand, 整数型, , 32位整数，高质量伪随机数 MT算法，不依赖任何CPU 或 特殊指令，干净卫生，放心食用！Code By:白银 <br /> .参数 min, 整数型, , 可为负数<br /> .参数 max, 整数型, , 可为负数<br /> .局部变量 g_p, 整数型, 静态<br /> .局部变量 p, 整数型<br /> <br /> ' 利用旋转(扭曲)线性反馈移位寄存器(TGFSR)产生随机数， 目前质量最高的伪随机数算法！<br /> ' 参考文章： http://www.cppblog.com/Chipset/archive/2009/01/19/72330.html<br /> .如果真 (g_p ＝ 0)  ' 多线程安全，不用加锁！<br />     ' 放心，这里是多线程安全的，最多也就【最开始】并行的那几条线程，可能会泄露一点点点内存。最多也就几kb也是可以接受的。<br />     ' 一开始就被大量并行调用的概率也很小，如果再专门多搞个子程序用来初始化，就不方便使用了~！<br />     ' 如有洁癖请自己改造！！！或者程序刚启动的时候，先随便调用一次！<br />     g_p ＝ 申请内存 (2504, 真)<br />     .如果真 (g_p ＝ 0)<br />         返回 (min)<br />     .如果真结束<br /> <br /> .如果真结束<br /> p ＝ g_p<br /> 置入代码 ({ 96, 131, 120, 8, 0, 15, 132, 224, 0, 0, 0, 185, 1, 0, 0, 0, 246, 64, 4, 1, 117, 250, 135, 72, 4, 133, 201, 117, 243, 129, 56, 112, 2, 0, 0, 116, 91, 139, 16, 255, 0, 139, 76, 144, 8, 199, 64, 4, 0, 0, 0, 0, 137, 200, 193, 233, 11, 49, 193, 137, 200, 37, 173, 88, 58, 255, 193, 224, 7, 49, 193, 137, 200, 37, 140, 223, 255, 255, 193, 224, 15, 49, 193, 137, 200, 193, 232, 18, 49, 200, 139, 77, 12, 139, 93, 8, 57, 217, 124, 20, 41, 217, 65, 49, 210, 247, 241, 137, 208, 1, 216, 137, 68, 36, 28, 97, 201, 194, 8, 0, 139, 77, 8, 139, 93, 12, 235, 228, 49, 246, 139, 125, 252, 87, 85, 131, 199, 8, 137, 253, 187, 141, 1, 0, 0, 70, 137, 242, 49, 192, 129, 254, 112, 2, 0, 0, 15, 68, 208, 139, 84, 149, 0, 51, 23, 129, 226, 255, 255, 255, 127, 51, 23, 137, 208, 209, 232, 137, 193, 129, 241, 223, 176, 8, 153, 128, 226, 1, 15, 68, 200, 49, 210, 129, 251, 112, 2, 0, 0, 15, 68, 218, 137, 218, 51, 76, 149, 0, 137, 15, 141, 127, 4, 67, 129, 251, 141, 1, 0, 0, 117, 179, 93, 88, 199, 0, 0, 0, 0, 0, 233, 58, 255, 255, 255, 100, 139, 13, 32, 0, 0, 0, 100, 161, 44, 0, 0, 0, 100, 15, 175, 13, 36, 0, 0, 0, 131, 209, 0, 100, 51, 5, 48, 0, 0, 0, 51, 77, 252, 247, 225, 17, 194, 139, 93, 252, 131, 195, 8, 137, 19, 49, 192, 137, 209, 193, 233, 30, 49, 209, 105, 209, 101, 137, 7, 108, 64, 1, 194, 137, 20, 131, 61, 111, 2, 0, 0, 114, 230, 233, 70, 255, 255, 255 })<br /> 返回 (0)<br /> <br /> .子程序 MT_RandL, 长整数型, , 64位长整数，高质量伪随机数 MT算法，不依赖任何CPU 或 特殊指令，干净卫生，放心食用！Code By:白银 <br /> .参数 min, 长整数型, , 可为负数<br /> .参数 max, 长整数型, , 可为负数<br /> .局部变量 g_p, 整数型, 静态<br /> .局部变量 p, 整数型<br /> <br /> ' 利用旋转(扭曲)线性反馈移位寄存器(TGFSR)产生随机数， 目前质量最高的伪随机数算法！<br /> .如果真 (g_p ＝ 0)  ' 多线程安全，不用加锁！<br />     ' 放心，这里是多线程安全的，最多也就【最开始】并行的那几条线程，可能会泄露一点点点内存。最多也就几kb也是可以接受的。<br />     ' 一开始就被大量并行调用的概率也很小，如果再专门多搞个子程序用来初始化，就不方便使用了~！<br />     ' 如有洁癖请自己改造！！！或者程序刚启动的时候，先随便调用一次！<br />     g_p ＝ 申请内存 (2504, 真)<br />     .如果真 (g_p ＝ 0)<br />         返回 (min)<br />     .如果真结束<br /> <br /> .如果真结束<br /> p ＝ g_p<br /> 置入代码 ({ 87, 86, 83, 131, 120, 8, 0, 15, 132, 53, 2, 0, 0, 137, 193, 187, 1, 0, 0, 0, 246, 64, 4, 1, 117, 250, 135, 88, 4, 133, 219, 117, 243, 139, 0, 255, 1, 61, 55, 1, 0, 0, 15, 135, 186, 0, 0, 0, 139, 84, 193, 12, 139, 68, 193, 8, 199, 65, 4, 0, 0, 0, 0, 137, 211, 137, 193, 193, 235, 29, 15, 172, 209, 29, 137, 222, 137, 207, 129, 230, 85, 85, 85, 85, 129, 231, 85, 85, 85, 85, 49, 214, 49, 199, 137, 243, 137, 249, 137, 254, 137, 223, 193, 230, 17, 15, 164, 207, 17, 137, 240, 137, 250, 37, 0, 0, 166, 237, 129, 226, 255, 127, 214, 113, 49, 200, 49, 218, 139, 93, 20, 137, 209, 137, 194, 139, 117, 8, 193, 226, 5, 131, 236, 8, 129, 226, 224, 238, 247, 255, 139, 125, 12, 49, 202, 82, 137, 209, 193, 233, 11, 49, 200, 80, 139, 77, 16, 137, 248, 57, 206, 25, 216, 125, 45, 41, 241, 25, 251, 137, 200, 137, 218, 137, 193, 137, 211, 131, 193, 1, 131, 211, 0, 137, 92, 36, 12, 137, 76, 36, 8, 232, 252, 1, 0, 0, 131, 196, 16, 1, 240, 17, 250, 91, 94, 95, 201, 194, 16, 0, 41, 206, 25, 223, 137, 240, 137, 206, 137, 250, 137, 223, 235, 205, 85, 131, 236, 20, 131, 193, 8, 137, 76, 36, 8, 141, 153, 224, 4, 0, 0, 137, 202, 137, 76, 36, 12, 137, 216, 139, 58, 139, 114, 8, 139, 90, 4, 139, 170, 224, 4, 0, 0, 129, 230, 255, 255, 255, 127, 129, 231, 0, 0, 0, 128, 9, 247, 137, 254, 137, 249, 137, 223, 15, 172, 222, 1, 209, 239, 49, 245, 139, 178, 228, 4, 0, 0, 49, 254, 137, 207, 131, 231, 1, 116, 12, 129, 245, 233, 25, 102, 169, 129, 246, 90, 111, 2, 181, 137, 42, 131, 194, 8, 137, 114, 252, 57, 208, 117, 175, 139, 76, 36, 12, 139, 68, 36, 8, 141, 169, 216, 4, 0, 0, 139, 152, 224, 4, 0, 0, 139, 144, 232, 4, 0, 0, 129, 227, 0, 0, 0, 128, 129, 226, 255, 255, 255, 127, 9, 211, 139, 80, 4, 137, 28, 36, 139, 152, 228, 4, 0, 0, 139, 52, 36, 137, 92, 36, 4, 139, 124, 36, 4, 139, 24, 15, 172, 254, 1, 209, 239, 49, 243, 139, 52, 36, 49, 250, 131, 230, 1, 116, 12, 129, 243, 233, 25, 102, 169, 129, 242, 90, 111, 2, 181, 137, 152, 224, 4, 0, 0, 131, 192, 8, 137, 144, 220, 4, 0, 0, 57, 197, 117, 156, 139, 1, 139, 153, 184, 9, 0, 0, 139, 81, 4, 137, 197, 129, 227, 0, 0, 0, 128, 129, 229, 255, 255, 255, 127, 9, 235, 137, 28, 36, 139, 153, 188, 9, 0, 0, 139, 60, 36, 139, 52, 36, 137, 92, 36, 4, 139, 108, 36, 4, 139, 153, 216, 4, 0, 0, 15, 172, 239, 1, 209, 237, 49, 251, 139, 185, 220, 4, 0, 0, 49, 239, 131, 230, 1, 116, 12, 129, 243, 233, 25, 102, 169, 129, 247, 90, 111, 2, 181, 137, 153, 184, 9, 0, 0, 187, 1, 0, 0, 0, 137, 185, 188, 9, 0, 0, 131, 233, 8, 131, 196, 20, 199, 1, 1, 0, 0, 0, 93, 233, 246, 253, 255, 255, 85, 80, 137, 197, 100, 139, 21, 32, 0, 0, 0, 100, 161, 44, 0, 0, 0, 100, 15, 175, 21, 36, 0, 0, 0, 100, 51, 5, 48, 0, 0, 0, 131, 210, 0, 1, 232, 131, 208, 0, 137, 85, 12, 137, 69, 8, 49, 255, 190, 1, 0, 0, 0, 187, 45, 127, 149, 76, 235, 6, 131, 198, 1, 131, 215, 0, 137, 209, 193, 233, 30, 137, 205, 137, 209, 49, 197, 105, 201, 45, 127, 149, 76, 105, 213, 45, 244, 81, 88, 137, 232, 137, 253, 1, 209, 247, 227, 1, 202, 1, 240, 141, 12, 245, 0, 0, 0, 0, 139, 44, 36, 17, 250, 137, 68, 13, 8, 137, 84, 13, 12, 129, 254, 55, 1, 0, 0, 117, 187, 89, 93, 233, 32, 254, 255, 255, 85, 87, 86, 83, 131, 236, 28, 139, 92, 36, 52, 139, 68, 36, 60, 139, 116, 36, 48, 139, 124, 36, 56, 137, 218, 133, 192, 117, 51, 57, 223, 118, 16, 137, 240, 247, 247, 137, 208, 49, 210, 131, 196, 28, 91, 94, 95, 93, 195, 137, 253, 133, 255, 117, 11, 184, 1, 0, 0, 0, 49, 210, 247, 247, 137, 197, 137, 216, 49, 210, 247, 245, 137, 240, 247, 245, 137, 208, 235, 215, 137, 241, 57, 216, 118, 10, 137, 240, 131, 196, 28, 91, 94, 95, 93, 195, 15, 189, 232, 131, 245, 31, 117, 26, 57, 216, 15, 130, 160, 0, 0, 0, 57, 247, 15, 134, 152, 0, 0, 0, 137, 200, 131, 196, 28, 91, 94, 95, 93, 195, 137, 233, 186, 32, 0, 0, 0, 41, 234, 211, 224, 137, 68, 36, 8, 137, 209, 137, 248, 211, 232, 139, 76, 36, 8, 137, 84, 36, 4, 139, 84, 36, 4, 9, 193, 137, 216, 137, 76, 36, 8, 137, 233, 211, 231, 137, 209, 211, 232, 137, 233, 137, 124, 36, 12, 211, 227, 137, 199, 137, 209, 137, 240, 211, 232, 137, 233, 137, 250, 211, 230, 9, 216, 247, 116, 36, 8, 137, 209, 137, 243, 247, 100, 36, 12, 137, 198, 137, 215, 57, 209, 114, 6, 117, 16, 57, 195, 115, 12, 43, 68, 36, 12, 27, 84, 36, 8, 137, 215, 137, 198, 137, 202, 15, 182, 76, 36, 4, 41, 243, 25, 250, 137, 208, 211, 224, 137, 233, 211, 235, 211, 234, 9, 216, 131, 196, 28, 91, 94, 95, 93, 195, 137, 218, 41, 254, 25, 194, 137, 241, 137, 200, 233, 91, 255, 255, 255 })<br /> <br /> 返回 (0)

飞宇

有点意思~！之前用到过

xx90

神女软件定制 发表于 2025-3-1 19:13
我看了你的代码，总感觉随机分布不均匀，我测试了下，但是确实又是均匀的

我也不知道啊……也有点懵。

1184798949

感谢分享

神女软件定制

我看了你的代码，总感觉随机分布不均匀，我测试了下，但是确实又是均匀的


但是总你这代码有问题，比如：取随机数 (-2147483647, 2147483647)，根本不可能返回有的区间值啊