题目编号生成器

源代码：

#include<cstdio>
#include<cstdlib>
#include<ctime>
using namespace std;
int main()
{
    printf("< Copyright by X-Axis >\n\n");
    printf("Just a remider:\n    This is for your reference only.\n\n\n");
    printf("CodeVS Problem ID : ");
    srand(time(0));
    while (1)
    {
          int t=rand()%10;
          if (t<5&&t)
          {
                printf("%d",t);
                break;
          }
    }
    for (int a=0;a<3;a++)
      printf("%d",rand()%10);
    printf("\n\n");
    return 0;
}