srand((unsigned)time(NULL));    std::vector
     
       hour;//时    std::vector
      
        minute;//分    std::vector
       
         second;//秒    std::vector
        
          vSecond;//总秒数    int n = 5000;//随机个数    for (int i = 0; i < n; i++)  {           int _second = rand() % 18000;          vSecond.push_back(_second);    }    for(int i =0 ; i< n-1; ++i) {           for(int j = 0; j < n-i-1; ++j){            if(vSecond[j] < vSecond[j+1])    {                int tmp = vSecond[j] ;                    vSecond[j] = vSecond[j+1] ;                     vSecond[j+1] = tmp;     }    }   }    for (int i = 0; i < n; i++){           hour.push_back(vSecond[i] / 3600);        minute.push_back(vSecond[i] / 60 % 60);          second.push_back(vSecond[i]  % 60);      }      FILE *f;    f = fopen("Time.csv" , "wb");    for (int i =0; i< n; i++)  {           fprintf(f,"%d, %d, %d\n", hour[i], minute[i], second[i]);    }    fclose(f);