C++骰子程序难点

Question

问题:

Repeatedly roll 3 dice until doubles are rolled (any two are the same). Show the values each time and afterwards state how many tries it took to get doubles.

我的代码:

#include <iostream>
#include <time.h>
#include <stdlib.h>
#include <string.h>

using namespace std;

int main ()
{
    srand (time(NULL));
    int j=1;
    int i=0;
    int a;
    int b;

    do
    {
        int a=(rand ()%6+1);
        int b=(rand ()%6+1);

        cout<<a<<" and "<<b<<endl<<endl;
        j++;
    }
    while (a!=b);

    cout<<"They are the same!"<<endl<<endl;
    cout<<"It took "<<j<<" tries.";

    return 0;
}

问题:

循环不会停止。即使 a 和 b 相同，程序也不会停止。

Answer 1

您正在 do ... while 循环中重新定义 a 和 b。删除第二个 a 和 b 定义之前的 int，您可以在其中将随机值分配给变量，它会起作用。