一.Random 类 Random类默认的无参构造函数可以根据当前系统时钟为种子,进行一系列算法得出要求范围内的伪随机数. 代码如下: Random rd = new Random(); int i = rd.Next(); 这种随机数可以达到一些要求较低的目标,但是如果在高并发的情况下,Random类所取到的系统时钟种子接近甚至完全一样,就很有可能出现重复,...
//generate a random number in the range of [0,1]double uniform_zero_to_one(){ return (double)rand()/RAND_MAX;} (二)任意实数区间的uniform分布: //generate a random real number in [start,end]double uniform_real(double start,double end){ double rate=(double)rand()/RAND_MAX; return st...
#include <stdio.h> #include <stdlib.h> #include int main() { srand(time(0)); // use current time as seed const int loop_count = 100; for (int i=0; i<loop_count; i++) { int random_value = rand(); // get a random number in range [0, RAND_MAX] printf("%d\n", ran...
intftime(struct timeb*tp); 其中timeb结构体定义如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 struct??timeb{time_t time;/* 为1970-01-01至今的秒数*/unsigned short millitm;/* 毫秒值 */short timezonel;/* 为目前时区和Greenwich相差的时间,单位为分钟 */short dstflag;/* 为日光节约...
include //用到了time函数 int main(){ srand((unsigned) time(NULL)); //用时间做种，每次产生随机数不一样 for (int i=0; i<10; i++) { int number = rand() % 99 + 30; //产生30-100的随机数 printf("%d\n", number); } return 0;}int main(v...
*void srand(seed) - seed the random number generator * *Purpose: * Seeds the random number generator with the int given. Adapted from the * BASIC random number generator. * *Entry: * unsigned seed - seed to seed rand # generator with ...
include <stdio.h>#include <stdlib.h>#include int randomnumber(int a,int b);int main(void) {int a,b;scanf("%d%d",&a,&b);srand(time(NULL));printf("%d\n",randomnumber(a,b));return 0;}int randomnumber(int a,int b){return rand()%(b-a+1)+a;} ...
voidtest_random(){ std::uniform_real_distribution<> d(4.5,5.2); for(inti =0; i <20; ++i) std::cout<< d(gen) <<std::endl; getchar(); } intmain(intargc,char**argv){ returntest_random(); } // output 4.59483 5.08451
#include<iostream> #include<random> int main() { // 创建随机数生成引擎 std::random_device rd; std::mt19937 gen(rd()); // 设置随机数生成范围 std::uniform_int_distribution<> dist(1, 100); // 生成随机整数 int random_number = dist(gen); // 输出随机整数 std::cout << "随机整数:...
int* getRandom() { static int r[10]; int i; /* 设置种子 */ srand((unsigned)time(NULL)); for (i = 0; i < 10; ++i) { r[i] = rand(); printf("%d\n", r[i]); } return r; } /* 要调用上面定义函数的主函数 */ ...