本文详细介绍了C++中rand()和srand()函数的功能，包括它们如何生成伪随机数序列以及如何通过设置不同的种子来确保每次运行程序时都能获得不同的随机数序列。重点阐述了rand()函数生成随机整数的方法，并通过实例展示了如何使用srand()函数改变种子值以实现随机数的多样化。
1. rand() function
- header file : cstdlib
- to obtain a random integer between 0 and 9, use rand() % 10
- In fact, the numbers produced by rand() are pseudorandom, i.e. it produces the same sequence of numbers every time it is executed on the same system, because the algorithm used by the rand() function uses a value called the seed to control how to generate the numbers. By default the seed value is 1.
2. srand(seed) function
- header file : cstdlib
- function : to change the seed
- srand(time(0)) : to ensure that the seed value is different each time you run the program
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
