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 #include <vector>

 #include <iostream>

 #include <cassert>

 #include <algorithm>

 using std::cout;

 using std::endl;

 void rand_test(int n, int times)

 {

     std::vector<int> data;

     data.resize(n);

     for(int i = 0; i < times; ++i)

     {

         ++data[rand() % n];

     }

     for(size_t i = 0; i < data.size(); i++)

     {

         cout << i << " - " << data[i] << "\t";

     }

     cout << "min - " << std::distance(data.begin(), std::min_element(data.begin(), data.end()));

     cout << endl; 

 }

 void main()

 {

     assert(RAND_MAX == 0x7FFF);

     // 这里的0x7FFF是确保你所使用的rand函数最大值是32767（可以取到）

     const int n = 3;

     rand_test(n, 0x000FFFFF);

     rand_test(n, 0x001FFFFF);

     rand_test(n, 0x002FFFFF);

     rand_test(n, 0x003FFFFF);

     rand_test(n, 0x004FFFFF);

     rand_test(n, 0x005FFFFF);

     rand_test(n, 0x006FFFFF);

     rand_test(n, 0x007FFFFF);

     rand_test(n, 0x008FFFFF);

     rand_test(n, 0x009FFFFF);

     rand_test(n, 0x00AFFFFF);

     rand_test(n, 0x00BFFFFF);

     rand_test(n, 0x00CFFFFF);

     rand_test(n, 0x00DFFFFF);

     rand_test(n, 0x00EFFFFF);

     rand_test(n, 0x00FFFFFF);

 }