srand and rand
时间: 2023-10-02 17:05:59 浏览: 51
_crol_是一个循环字符左移函数,在51单片机中包含在intrins.h头文件中。它接受两个参数,c为要移位的字符,b为移动的位数。通过调用_crol_函数,可以将字符循环左移b位。举例来说,对于一个char型数据1,利用_crol_函数操作_crol_(1,8)后的结果是128。这个函数的作用类似于使用左移运算符<<操作对数据进行左移。循环移位函数包括_crol_,_cror_,_irol_,_iror_,_lrol_和_lror_,分别对应字符循环左移、字符循环右移、整数循环左移、整数循环右移、长整数循环左移和长整数循环右移。与移位运算符相比,循环移位函数可以更灵活地进行位移操作。
相关问题
使用rand 产生随机数
Sure, you can use the rand() function in C/C++ to generate random numbers. The syntax is: int randomNumber = rand(); The rand() function generates a random number between 0 and RAND_MAX (a constant defined in the standard library). You can also use srand(seed) function to set a seed for the rand() function, so that the sequence of random numbers generated will be deterministic.
srand(time(0));x = (rand() % 1490)+5;
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