如何生成每次都不同的随机数

cherish_Tien

想问一下如何使范闲和范若若的业绩分数每次都不一样（就是让process, rtime, sellings, stime的值每次取不同的随机数）
谢谢大神们！

                               
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下面是我的代码：
#include<iostream>
#include<stdlib.h>
using namespace std;
class people
{
protected:
        char* name;
        char* job;
public:
        people(char*name,char*job);
        void show();
};

class researcher:public people
{
private:
        double process;
        double rtime;
        double rscore;
public:
        researcher(char* name, char*job);
        void show();
};

class saler:public people
{
private:
        double sellings;
        double stime;
        double sscore;
public:
        saler(char* name, char*job);
        void show();
};

void people::show()
{
        cout<<"姓名:"<<name<<endl;
        cout<<"职位:"<<job<<endl;
}

people::people(char* name,char* job)
{
        this->name = name;
        this->job = job;
}

void researcher::show()
{
        cout<<"姓名:"<<name<<endl;
        cout<<"职位:"<<job<<endl;
        cout<<"业绩分数:"<<rscore<<endl;
}

researcher::researcher(char* name, char*job):people(name, job)
{
        this->process = rand();
        this->rtime = rand();
        this->rscore = 0.7*process + 0.3*rtime;
}

void saler::show()
{
        cout<<"姓名:"<<name<<endl;
        cout<<"职位:"<<job<<endl;
        cout<<"业绩分数:"<<sscore<<endl;
}

saler::saler(char* name, char* job):people(name, job)
{
        this->sellings = rand();
        this->stime = rand();
        this->sscore = 0.7*sellings + 0.3*stime;
}

int main()
{
        saler fan("范闲","销售人员");
        fan.show();
       
        researcher fanfemale("范若若","研究者");
        fanfemale.show();
       
        return 0;
}

wp231957

c++ 里面 随机数用不用初始化呢  
c里面 初始化种子  以后就不会重复

liujieyou

先用srand生成一个种子再调用rand，就有随机数了