Question

我正在尝试计算你需要购买彩票才能获胜的次数...但是我创建的这个程序一直在运行而且永远不会赢。我想不通为什么？我想这可能是因为兰特没有产生真正的随机数。

#include <iostream>
#include <sstream>
#include <ctime>

using namespace std;

int main(int argc, const char * argv[])
{

    int num1 = 0, num2 = 0, num3 = 0, num4 = 0, num5 = 0;
    int powerball = 0;

    int pnum1 = 0, pnum2 = 0, pnum3 = 0, pnum4 = 0, pnum5 = 0;
    int ppowerball = 0;
    srand((unsigned int)time(0));

    int  max = 59;
    int pmax = 35;

    bool winner = false;

    int count = 0;


    while (winner == false) {
        count++;

        powerball = (rand()%pmax)+1;

        num1 = (rand()%max)+1;

        num2 = (rand()%max)+1;
        while (num1 == num2)
            num2 = (rand()%max)+1;

        num3 = (rand()%max)+1;
        while (num3 == num1 || num3 == num2)
            num3 = (rand()%max)+1;

        num4 = (rand()%max)+1;
        while (num4 == num1 || num4 == num2 || num4 == num3)
            num4 = (rand()%max)+1;

        num5 =(rand()%max)+1;
        while (num5 == num1 || num5 == num2 || num5 == num3 || num5 == num4)
            num5 = (rand()%max)+1;

        pnum1 = (rand()%max)+1;

        pnum2 = (rand()%max)+1;
        while (pnum2 == pnum1)
            pnum2 = (rand()%max)+1;

        pnum3 = (rand()%max)+1;
        while (pnum3 == pnum1 || pnum3 == pnum2)
            pnum3 = (rand()%max)+1;

        pnum4 = (rand()%max)+1;
        while (pnum4 == pnum1 || pnum4 == pnum2 || pnum4 == pnum3)
            pnum4 = (rand()%max)+1;

        pnum5 = (rand()%max)+1;
        while (pnum5 == pnum1 || pnum5 == pnum2 || pnum5 == pnum3 || pnum5 == pnum4)
            pnum5 = (rand()%max)+1;

        ppowerball = (rand()%pmax)+1;

        int myNumbers[] = {num1, num2, num3, num4, num5};
        sort(myNumbers, myNumbers + sizeof myNumbers / sizeof myNumbers[0]);


        int thereNumbers[] = {pnum1, pnum2, pnum3, pnum4, pnum5};
        sort(thereNumbers, myNumbers + sizeof thereNumbers/ sizeof thereNumbers[0]);

        if(myNumbers[0] == thereNumbers[0])
            if(myNumbers[1] == thereNumbers[1])
                if(myNumbers[2] == thereNumbers[2])
                    if(myNumbers[3] == thereNumbers[3])
                        if(myNumbers[4] == thereNumbers[4])
                            if(powerball == ppowerball){
                                winner = true;
                                cout << "Count: " << count << endl;

                                cout << num1 << "\t" << num2 << "\t" << num3 << "\t" << num4 << "\t" << num5 << "\tP: " << powerball << endl;
                                cout << pnum1 << "\t" << pnum2 << "\t" << pnum3 << "\t" << pnum4 << "\t" << pnum5 << "\tP: " << ppowerball << endl;
                                cout << endl;
                            }

        if(count%1000000 == 0)
            cout << count << endl;

    }

    cout << endl;
    cout << "Count: " << count << endl;
    cout << num1 << " " << num2 << " " << num3 << " " << num4 << " " << num5 << "P: " << powerball << endl;


    return 0;
}

Answer 1

我确实在你认为的程序中发现了一个错误。

您的sort（）方法参数不正确。这导致您的数组被移位而没有正确排序。

请改为尝试：

int myNumbers[] = {num1, num2, num3, num4, num5};
sort(begin(myNumbers), end(myNumbers));


int thereNumbers[] = {pnum1, pnum2, pnum3, pnum4, pnum5};
sort(begin(thereNumbers), end(thereNumbers));

通过此更改，我能够让程序实际匹配两个数字并退出。

这里我在132,245,227次迭代中“赢了”当我运行你的代码时只有上面提到的更改：

Count: 132245227
32 57 24 4 23 P: 4

C ++中的彩票计划不会获胜

1 个答案: