程序代码：

#include  <stdio.h>
#include  <stdlib.h>
#include  <time.h>
#include  <string.h>
#include  <windows.h>

struct  TIME
{
    int hour, minute, second;
    void  count_down();
    void  time_show();
    void  time_run();
    void  time_set(int, int, int);
};

void poem_store();
void poem_show(char letter, char a[10]);

int  main(void)
{
    char array[10], check[2];
    char letter;
    int  h = 0, m = 0, s = 2;
    int  i, j = 2, score = 0;
   
    printf("请在5分钟内完成唐诗组合任务!\n");
    TIME a;
    a.time_set(h, m, s);
    a.time_run();
    printf("\n");
    poem_store();       
    printf("\n请用上面诗句对应的大写字母组织两个五言绝句:");
    while(j--)
    {
      printf("\n请输入四个大写字母,用空格间隔后回车:\n");
      for (i = 0; i < 4 && EOF != scanf(" %c", &letter); i++)
      {
        poem_show(letter, array);
      }
      array[i] = 0;
      check[j] = array[0];
      if (strcmp(array,"star") == 0 || strcmp(array, "foug") == 0)
      {
        if (check[1] == check[0])
            printf("重复组合，得0分!\n");
        else
        {
          score += 15;
          printf("你太厉害了,再接再厉!现在的分数是%d\n", score);
        }
      }
      else
          printf("错误!得0分.\n");
    }
      printf("稍等片刻……\n");
      Sleep(3000);
      system("cls");
      poem_store();
      printf("\n请用上面诗句对应的大写字母组织一个五言律诗:");
      printf("\n请输入八个大写字母,用空格间隔后回车:");
      for (i = 0; i < 8 && EOF != scanf(" %c", &letter); i++)
      {
        poem_show(letter, array);
      }
      array[i] = 0;
      if (strcmp(array,"bmecknyz") == 0 )
      {
      score += 30;
      printf("你太厉害了,再接再厉!现在的分数是%d\n", score);
      }
      else
          printf("错误!得0分.\n");    
      printf("稍等片刻……\n");
      Sleep(3000);
      system("cls");
      poem_store();
      printf("\n请用上面诗句对应的大写字母组织一个五言乐府:");       
      printf("\n请输入十个大写字母,用空格间隔后回车:");
      for (i = 0; i < 10 && EOF != scanf(" %c", &letter); i++)
      {
        poem_show(letter, array);
      }
      array[i] = 0;
      if (strcmp(array,"wjhpdilqvx") == 0 )
      {
      score += 40;
      printf("你太厉害了!现在的分数是%d\n", score);
      }
      else
          printf("错误!得0分.\n");   
    if (h == 0 && m == 0 && s == 0)
    {
        printf("时间到!你的成绩是%d分\n", score);
        Sleep(3000);
        exit(0);
    }
    return 0;
}

void poem_store()
{
   printf("A:本来无一物B:百川东到海C:常恐秋节至D:荡胸生层云E:何处惹尘埃\n");
   printf("F:两句三年得G:归卧故山丘H:何时复西归I:岱宗夫如何J:决眦入归鸟\n");
   printf("K:焜黄华叶衰L:老大徒伤悲M:明镜亦非台N:一吟双泪流O:知音如不赏\n");
   printf("P:菩提本无树Q:青青园中葵R:齐鲁青未了S:少壮不努力T:造化钟神秀\n");
   printf("U:会当凌绝顶V:一览众山小W:万物生光辉X:阴阳割昏晓Y:阳春布德泽Z:朝露待日晞\n");
}

void poem_show(char letter, char a[10])
{   
   switch (letter)
   {
   case 'A': printf("本来无一物\n"); a[2] = 'a'; break;
   case 'B': printf("百川东到海\n"); a[6] = 'l'; break;
   case 'C': printf("常恐秋节至\n"); a[4] = 'd'; break;
   case 'D': printf("荡胸生层云\n"); a[4] = 'k'; break;
   case 'E': printf("何处惹尘埃\n"); a[3] = 'r'; break;
   case 'F': printf("两句三年得\n"); a[0] = 'f'; break;
   case 'G': printf("归卧故山丘\n"); a[3] = 'g'; break;
   case 'H': printf("何时复西归\n"); a[7] = 'q'; break;
   case 'I': printf("岱宗夫如何\n"); a[0] = 'b'; break;
   case 'J': printf("决眦入归鸟\n"); a[5] = 'n'; break;
   case 'K': printf("焜黄华叶衰\n"); a[5] = 'i'; break;
   case 'L': printf("老大徒伤悲\n"); a[9] = 'x'; break;
   case 'M': printf("明镜亦非台\n"); a[1] = 't'; break;
   case 'N': printf("一吟双泪流\n"); a[1] = 'o'; break;
   case 'O': printf("知音如不赏\n"); a[2] = 'u'; break;
   case 'P': printf("菩提本无树\n"); a[0] = 's'; break;
   case 'Q': printf("青青园中葵\n"); a[0] = 'w'; break;
   case 'R': printf("齐鲁青未了\n"); a[1] = 'm'; break;
   case 'S': printf("少壮不努力\n"); a[8] = 'v'; break;
   case 'T': printf("造化钟神秀\n"); a[2] = 'e'; break;
   case 'U': printf("会当凌绝顶\n"); a[6] = 'y'; break;
   case 'V': printf("一览众山小\n"); a[7] = 'z'; break;
   case 'W': printf("万物生光辉\n"); a[3] = 'p'; break;
   case 'X': printf("阴阳割昏晓\n"); a[3] = 'c'; break;
   case 'Y': printf("阳春布德泽\n"); a[2] = 'h'; break;
   case 'Z': printf("朝露待日晞\n"); a[1] = 'j'; break;
   default:  printf("哦米拖佛,施主请输入大写字母\n"); break;
   } 
}

void TIME::count_down()
{
    long t = time(NULL);
    while (t == time(NULL));
    if (--second < 0)
    {
        second = 59;
        if (--minute < 0)
        {
            minute = 59;
            --hour;
        }
    }
}

void  TIME::time_show()
{
    printf("\r");
    if (hour < 10)
        printf("0");
        printf("%d:", hour);
    if (minute < 10)
        printf("0");
        printf("%d:", minute);
    if (second < 10)
        printf("0");
        printf("%d", second);
}

void  TIME::time_run()
{
    while (second != 0 || minute != 0 || hour != 0)
    {
        count_down();
        time_show();
    }
}
void  TIME::time_set(int h, int m, int s)
{
    hour = h;
    minute = m;
    second = s;
}