程序设计：哈希表的一个应用

#include <stdio.h>
#include <conio.h>
#include <ctype.h>
#define L 50 /*定义哈希表长*/
#define M 47  /*定义p值*/
#define N 30   /*定义名单长*/
char z[22];
struct old{char *name;char *py;int k;};
struct old oldlist[L];/*原始表*/
struct  hterm
{ char *name;char *py;
int k;int si;
};
struct hterm hlist[L];/*哈希表*/
int i,adr,sum,d;
char ch1;
float average;
/**********************************/
void chash()
{for (i=0;i<L;i++)
     {hlist[i].name="";
      hlist[i].py="";
      hlist[i].k=0;
      hlist[i].si=0;
     };
 for (i=0;i<N;i++)
     { sum=0;
     adr=(oldlist[i].k)%M;
     d=adr;
     if(hlist[adr].si==0)
       {hlist[adr].k=oldlist[i].k;
        hlist[adr].name=oldlist[i].name;
        hlist[adr].py=oldlist[i].py;
        hlist[adr].si=1;
       }
     else
       {do
   {d=(d+((oldlist[i].k))%10+1)%M;/*伪随机*/
           sum=sum+1;
          }
        while (hlist[d].k!=0);
        hlist[d].k=oldlist[i].k;
        hlist[d].name=oldlist[i].name;
        hlist[d].py=oldlist[i].py;
        hlist[d].si=sum+1;
       }
  }
}

/***************************************/
void findhlist()
{ int s0;char r,g;
  clrscr();/*清屏*/
  for (r=0;r<20;r++){z[r]=0;};
   gotoxy(1,1);printf("查找：copyright by 姚建飞 2003.6");
 gotoxy(5,10);printf("请拼音后回车！");
 gotoxy(5,12);scanf("%s",z);
      s0=0;
      for (r=0;r<20;r++){s0=z[r]+s0;};
  gotoxy(5,13);    printf("%d",s0);
 /*for (i=0;i<L;i++)*/
      sum=1;
     adr=s0%M;
    d=adr;
     if(hlist[adr].k==s0)
       {
        gotoxy(18,18);printf("              ");
               gotoxy(18,18);printf("%s",hlist[d].name);
               gotoxy(18,19);printf("%s",hlist[d].py);
                  gotoxy(18,20);
                      printf("搜索 %d 次",sum);
            getch();
       }
     else
       {if (hlist[adr].k==0)
            {gotoxy (18,18);
             printf("无记录!                     ");
             getch();
            }
        else
            {g=0;
             for (i=0;g==0;i++)
          {d=(d+s0%10+1)%M;   /*伪随机*/
                  sum=sum+1;
                  if (hlist[d].k==0)
                     {gotoxy (18,18);
                      printf("无记录!                 ");
                      g=1;getch();
                     };
                  gotoxy(18,18);
                      printf("%s",hlist[d].name);
                      gotoxy(18,19);
                      printf("%s",hlist[d].py);
                      gotoxy(18,20);
                      printf("搜索 %d 次",sum);
                      getch();
                  if (hlist[d].k==s0)
                     {   g=1;
                      gotoxy(18,21);
                     printf("搜索 %d 次成功!",sum);
                      getch();
                     };
                 };

                };

       };

}

/***************************************/
void inp() /*输入表*/
{
 char *f;
 int r,s0;

 oldlist[0].name="桂芳芳";oldlist[0].py="guifanfan";
 oldlist[1].name="姚建飞";oldlist[1].py="yaojianfei";
 oldlist[2].name="杨扬";oldlist[2].py="yangyang";
 oldlist[3].name="朱玉环";oldlist[3].py="zhuyuhuang";
 oldlist[5].name="陈曦";oldlist[5].py="chenxi";
 oldlist[6].name="张雷";oldlist[6].py="zhanglei";
 oldlist[7].name="盛永海";oldlist[7].py="shenyonghai";
 oldlist[8].name="陈道全";oldlist[8].py="chengdaoquan";
 oldlist[9].name="陆道清";oldlist[9].py="ludaoqing";
 oldlist[10].name="龚云祥";oldlist[10].py="gongyunxiang";
 oldlist[11].name="孙振兴";oldlist[11].py="sunzhenxing";
 oldlist[12].name="孙容飞";oldlist[12].py="sunrongfei";
 oldlist[13].name="孙明龙";oldlist[13].py="sunminglong";
 oldlist[14].name="张浩";oldlist[14].py="zhanghao";
 oldlist[15].name="田苗";oldlist[15].py="tianmiao";
 oldlist[16].name="姚建中";oldlist[16].py="yaojianzhong";
 oldlist[17].name="姚建清";oldlist[17].py="yaojianqing";
 oldlist[18].name="姚建华";oldlist[18].py="yaojianhua";
 oldlist[19].name="张海峰";oldlist[19].py="yaohaifeng";
 oldlist[20].name="陈言号";oldlist[20].py="chengyanhao";
 oldlist[21].name="姚秋锋";oldlist[21].py="yaoqiufeng";
 oldlist[22].name="钱鹏程";oldlist[22].py="qianpengcheng";
 oldlist[23].name="姚海峰";oldlist[23].py="yaohaifeng";
 oldlist[24].name="卞艳";oldlist[24].py="bianyan";
 oldlist[25].name="凌蕾";oldlist[25].py="linglei";
 oldlist[26].name="李伟";oldlist[26].py="liwei";
 oldlist[27].name="黄海燕";oldlist[27].py="huanhaiyan";
 oldlist[28].name="刘殿琴";oldlist[28].py="liudianqin";
 oldlist[29].name="李云";oldlist[29].py="liyun";

/*
请在此输入数据,同时修改程序开头的 M　L N

*/
for (i=0;i<N;i++)
     {
 s0=0;
        f=oldlist[i].py;

        for (r=0;*(f+r) != '\0';r++){s0=*(f+r)+s0;};

        oldlist[i].k=s0;

     };

}

/****************************************/
void  dhash() /*显示哈希表*/
{  char LON=17;
   clrscr();
   if (LON>L){LON=L;};
   gotoxy(1,1);printf("哈希表：copyright by 姚建飞 2003.6");
   gotoxy(1,2);printf("地址:");
   for(i=0;i<LON;i++)
      {gotoxy(1,i+3);
       printf("%-3d",i);
      };
   gotoxy(9,2);printf("要害字:");
   for(i=0;i<LON;i++)
      {gotoxy(10,i+3);
       printf("%-6d",hlist[i].k);
      };
   gotoxy(19,2);printf("姓名:");
   for(i=0;i<LON;i++)
      {gotoxy(19,3+i);
       printf("%s",hlist[i].name);
      };
  gotoxy(28,2);printf("拼音:");
   for(i=0;i<LON;i++)
      {gotoxy(28,i+3);
       printf("%s",hlist[i].py);
      };
   gotoxy(40,2);printf("搜索长度:");
   for(i=0;i<LON;i++)
      {gotoxy(43,i+3);
       printf("%2d",hlist[i].si);
      };
  gotoxy(53,2);printf("H(key):");
   for(i=0;i<LON;i++)
      {gotoxy(53,i+3);
       printf("%2d",(hlist[i].k)%M);
      };
   average=0;
   for (i=0;i<L;i++)
       {average=average+hlist[i].si;};
   average=average/N;
   gotoxy(10,23);
  printf("平均搜索长度：ASL(%d)=%f",N,average);

 gotoxy(20,24);
  printf("任意键下一屏!");
  ch1=getch();

    if (L>15)
    {
   clrscr();
   if (LON>L-15){LON=L-15;};
    gotoxy(1,1);printf("哈希表：copyright by 姚建飞 2003.6");
    gotoxy(1,2);printf("地址:");
    for(i=0;i<LON;i++)
       {gotoxy(1,i+3);
        printf("%-3d",i+15);
       };
    gotoxy(9,2);printf("要害字:");
    for(i=0;i<LON;i++)
       {gotoxy(10,i+3);
        printf("%-6d",hlist[i+15].k);
       };
    gotoxy(19,2);printf("姓名:");
    for(i=0;i<LON;i++)
       {gotoxy(19,3+i);
        printf("%s",hlist[i+15].name);
       };
    gotoxy(28,2);printf("拼音:");
    fo r(i=0;i<LON;i++)
       {gotoxy(28,i+3);
       printf("%s",hlist[i+15].py);
       };
    gotoxy(40,2);printf("搜索长度:");
    for(i=0;i<LON;i++)
       {gotoxy(43,i+3);
        printf("%2d",hlist[i+15].si);
       };
    gotoxy(53,2);printf("H(key):");
    for(i=0;i<LON;i++)
       {gotoxy(53,i+3);
        printf("%2d",(hlist[i+15].k)%M);
       };
    average=0;
    for (i=0;i<L;i++)
        {average=average+hlist[i].si;};
    average=average/N;
    gotoxy(10,23);
    printf("平均搜索长度：ASL(%d)=%f",N,average);

    gotoxy(20,24);
    printf("任意键下一屏!   ");
    ch1=getch();
      };
    if (L>30)
    {
   clrscr();
   if (LON>L-30){LON=L-30;};
    gotoxy(1,1);printf("哈希表：copyright by 姚建飞 2003.6");
    gotoxy(1,2);printf("地址:");
    for(i=0;i<LON;i++)
       {gotoxy(1,i+3);
        printf("%-3d",i+30);
       };
    gotoxy(9,2);printf("要害字:");
    for(i=0;i<LON;i++)
       {gotoxy(10,i+3);
        printf("%-6d",hlist[i+30].k);
       };
    gotoxy(19,2);printf("姓名:");
    for(i=0;i<LON;i++)
       {gotoxy(19,3+i);
        printf("%s",hlist[i+30].name);
       };
    gotoxy(28,2);printf("拼音:");
    for(i=0;i<LON;i++)
       {gotoxy(28,i+3);
       printf("%s",hlist[i+30].py);
       };
    gotoxy(40,2);printf("搜索长度:");
    for(i=0;i<LON;i++)
       {gotoxy(43,i+3);
        printf("%2d",hlist[i+30].si);
       };
    gotoxy(53,2);printf("H(key):");
    for(i=0;i<LON;i++)
       {gotoxy(53,i+3);
        printf("%2d",(hlist[i+30].k)%M);
       };
    average=0;
    for (i=0;i<L;i++)
        {average=average+hlist[i].si;};
    average=average/N;
    gotoxy(10,23);
    printf("平均搜索长度：ASL(%d)=%f",N,average);

    gotoxy(20,24);
    printf("任意键下一屏!   ");
    ch1=getch();
    };
    if (L>45)
    {
    clrscr();
    if (LON>L-45){LON=L-45;};
    gotoxy(1,1);printf("哈希表：copyright by 姚建飞 2003.6");
    gotoxy(1,2);printf("地址:");
    for(i=0;i<LON;i++)
       {gotoxy(1,i+3);
        printf("%-3d",i+45);
       };
    gotoxy(9,2);printf("要害字:");
    for(i=0;i<LON;i++)
       {gotoxy(10,i+3);
        printf("%-6d",hlist[i+45].k);
       };
    gotoxy(19,2);printf("姓名:");
    for(i=0;i<LON;i++)
       {gotoxy(19,3+i);
        printf("%s",hlist[i+45].name);
       };
    gotoxy(28,2);printf("拼音:");
    for(i=0;i<LON;i++)
       {gotoxy(28,i+3);
       printf("%s",hlist[i+45].py);
       };
    gotoxy(40,2);printf("搜索长度:");
    for(i=0;i<LON;i++)
       {gotoxy(43,i+3);
        printf("%2d",hlist[i+45].si);
       };
    gotoxy(53,2);printf("H(key):");
    for(i=0;i<LON;i++)
       {gotoxy(53,i+3);
        printf("%2d",(hlist[i+45].k)%M);
       };
    average=0;
    for (i=0;i<L;i++)
        {average=average+hlist[i].si;};
    average=average/N;
    gotoxy(10,23);
    printf("平均搜索长度：ASL(%d)=%f",N,average);

    gotoxy(20,24);
    printf("任意键返回!   ");
    ch1=getch();
    };

}
/**************************************/
void main()
  {inp();   /*输入原表*/
   chash ();/*建哈希表*/
a: clrscr();
   gotoxy(21,2);
   textcolor(GREEN);
   cprintf("欢迎使用本程序------------编者:姚建飞");
   printf("\n");
   gotoxy(22, 4);
   textcolor(GREEN);
   cprintf("   1. 显示哈希表");
   printf("\n");
   gotoxy(22, 6);
   textcolor(GREEN);
   cprintf("   2. 查找");
   printf("\n");
   gotoxy(22, 8);
   textcolor(GREEN);
   cprintf("   x. 退出");
   printf("\n");
   gotoxy(22, 12);
   cprintf(" 请输入选择: ");
   printf("\n");
   gotoxy(24,14);
   ch1=getch();
   if (ch1==0x78){ textcolor(GREEN);
   cprintf("谢谢使用本程序,你已经退出本程序!");printf("\n"); exit();};/*"x":退出*/
   if (ch1==0x31){dhash();};/*表的属性*/
   if (ch1==0x32){ findhlist();};/*查找*/
     goto a;

  }