抽奖实现

// 抽奖.cpp : 定义控制台应用程序的入口点。
//

include “stdafx.h”

include

include

include

using namespace std;

/*****************
中奖描述：
一等奖（A）: 10 权重
二等奖（B）: 20 权重
三等奖（C）: 200 权重
四等奖（D）: 800 权重

*********************/

enum EM_QuanZ
{
EM_A = 10,
EM_B = 20,
EM_C = 170,
EM_D = 800
};

int Bigrand()
{
//随机数列一般由srand()和rand()共同设置，从而得到真正意义上的随机
//设置随机种子
srand((unsigned)time(NULL));

return RAND_MAX*rand() + rand();

}

int a[4] = {0};

int GetRanDomKey()
{
//获取随机数
int number = (Bigrand() % (EM_A + EM_B + EM_C + EM_D)) + 1;

if ((number > 0) && (number <= EM_A))
{
    number = 1;
    ++a[0];
}
else if (number >= (EM_A + EM_B + EM_C))
{
    number = 4;
    ++a[3];
}
else if ((number >= (EM_A + EM_B)) && (number < (EM_A + EM_B + EM_C)))
{
    number = 3;
    ++a[2];
}
else if ((number >= EM_A) && (number < (EM_A + EM_B)))
{
    number = 2;
    ++a[1];
}
return number;

}
void GetAward(int key)
{
cout << “恭喜您中了” << key<<”等奖” << endl;
}

void Start()
{
while (true)
{
GetAward(GetRanDomKey());
int number = (rand() % 10) + 1;

    if ((a[0]+a[1]+a[2]+a[3]) == 100)
    {

        break;
    }
    std::this_thread::sleep_for(std::chrono::milliseconds(2000));
}

}

int _tmain(int argc, _TCHAR* argv[])
{
std::thread td(Start);
td.join();

for (int i = 0; i < 4; i++)
{
    cout <<i+1 <<"等奖中奖次数： " << a[i] << endl;
}
system("pause");
return 0;

}