因为你每次都使用相同的值播种– time 只有二级精度，我相信您的计算机可以在一秒钟内处理这六个循环迭代。 ; - ]

Because you're seeding with the same value each time – time only has second-level precision, and I'm quite sure your computer can process those six loop iterations within one second. ;-]

在程序开始时种子

Seed once, at the beginning of the program.