dhbgl.c

C语言源码

void Modify(TELEBOOK temp[],int n)
{
char findmess[20];
int p=0;
if(n<=0)
{ system("cls");
  printf("\n=====>No telephone number record!\n");
  getchar();
  return ;
}
system("cls");
printf("modify telephone book recorder");
Disp(temp,n);
stringinput(findmess,10,"input the existing name:"); /*输入并检验该姓名*/
p=Locate(temp,n,findmess,"name"); /*查询到该数组元素,并返回下标值*/
if(p!=-1) /*若p!=－1,表明已经找到该数组元素*/
{
   printf("Number:%s,\n",temp[p].num);
   printf("Name:%s,",temp[p].name);
   stringinput(temp[p].name,15,"input new name:");

   printf("Name:%s,",temp[p].phonenum);
   stringinput(temp[p].phonenum,15,"input new telephone:");

   printf("Name:%s,",temp[p].address);
   stringinput(temp[p].address,30,"input new address:");

   printf("\n=====>modify success!\n");
   getchar();
   Disp(temp,n);
   getchar();
   saveflag=1;
}
else
  {Nofind();
   getchar();
  }
return ;
}

/*插入记录:按编号查询到要插入的数组元素的位置，然后在该记录编号之后插入一个新数组元素。*/
int Insert(TELEBOOK temp[],int n)
{
   char ch,num[10],s[10];  /*s[]保存插入点位置之前的记录编号,num[]保存输入的新记录的编号*/
   TELEBOOK newinfo;
   int flag=0,i=0,kkk=0;
   system("cls");
   Disp(temp,n);
   while(1)
   { stringinput(s,10,"please input insert location  after the Number:");
     flag=0;i=0;
     while(i<n) /*查询该编号是否存在，flag=1表示该编号存在*/
     {
      if(strcmp(temp[i].num,s)==0)  {kkk=i;flag=1;break;}
      i++;
     }
      if(flag==1)
        break; /*若编号存在，则进行插入之前的新记录输入操作*/
     else
     {  getchar();
        printf("\n=====>The number %s is not existing,try again?(y/n):",s);
        scanf("%c",&ch);
        if(ch=='y'||ch=='Y')
         {continue;}
        else
          {return n;}
      }
   }
  /*以下新记录的输入操作与Add()相同*/

  while(1)
  { stringinput(num,10,"input new Number:");
    i=0;flag=0;
    while(i<n) /*查询该编号是否存在，flag=1表示该编号存在*/
     {
      if(strcmp(temp[i].num,num)==0)  {flag=1;break;}
      i++;
     }
       if(flag==1)
      {
       getchar();
       printf("\n=====>Sorry,The number %s is  existing,try again?(y/n):",num);
       scanf("%c",&ch);
       if(ch=='y'||ch=='Y')
       {continue;}
       else
       {return n;}
      }
      else
       break;
  }
  
  strcpy(newinfo.num,num); /*将字符串num拷贝到newinfo.num中*/
  stringinput(newinfo.name,15,"Name:");
  stringinput(newinfo.phonenum,15,"Telephone:");
  stringinput(newinfo.address,15,"Adress:");

  saveflag=1; /*在main()有对该全局变量的判断，若为1,则进行存盘操作*/

 for(i=n-1;i>kkk;i--) /*从最后一个组织元素开始往向移一个元素位置*/
 {
   strcpy(temp[i+1].num,temp[i].num);
   strcpy(temp[i+1].name,temp[i].name);
   strcpy(temp[i+1].phonenum,temp[i].phonenum);
   strcpy(temp[i+1].address,temp[i].address);
 }
   strcpy(temp[kkk+1].num,newinfo.num);  /*在kkk的元素位置后插入新记录*/
   strcpy(temp[kkk+1].name,newinfo.name);
   strcpy(temp[kkk+1].phonenum,newinfo.phonenum);
   strcpy(temp[kkk+1].address,newinfo.address);
   n++;
   Disp(temp,n);
   printf("\n\n");
   getchar();
   return n;
}


/*利用选择排序法实现数组的按记录编号或姓名的升序排序*/
void SelectSort(TELEBOOK temp[],int n)
{
int i=0,j=0,flag=0,indexmin,select;
char charflag[10];
TELEBOOK newinfo;
if(n<=0)
{ system("cls");
  printf("\n=====>Not telephone record!\n");
  getchar();
  return ;
}
system("cls");
Disp(temp,n);  /*显示排序前的所有记录*/
printf("     ==>1 SORT BY NUMBER   ==>2 SORT BY NAME\n");
printf("      please choice[1,2]:");
scanf("%d",&select);
if(select==1)   /*按记录编号排序*/
{
 for(i=0;i<n-1;i++)
 {
  flag=32767;indexmin=0;
  for(j=i;j<n;j++)
    { if(atoi(temp[j].num)<flag)
      { flag=atoi(temp[j].num);
        indexmin=j;
       }
     }
     strcpy(newinfo.num,temp[i].num);  /*利用结构变量newinfo实现数组元素的交换*/
     strcpy(newinfo.name,temp[i].name);
     strcpy(newinfo.phonenum,temp[i].phonenum);
     strcpy(newinfo.address,temp[i].address);

     strcpy(temp[i].num,temp[indexmin].num);
     strcpy(temp[i].name,temp[indexmin].name);
     strcpy(temp[i].phonenum,temp[indexmin].phonenum);
     strcpy(temp[i].address,temp[indexmin].address);

     strcpy(temp[indexmin].num,newinfo.num);
    strcpy(temp[indexmin].name,newinfo.name);
    strcpy(temp[indexmin].phonenum,newinfo.phonenum);
    strcpy(temp[indexmin].address,newinfo.address);
  }
      Disp(temp,n);  /*显示排序后的所有记录*/
      saveflag=1;
      printf("\n    =====>sort complete!\n");
      getchar();
      return;
 }
 else if(select==2)
 {
  for(i=0;i<n-1;i++)
 {
  charflag[0]=255;indexmin=0;
  for(j=i;j<n;j++)
    { if(strcmp(temp[j].name,charflag)>0)
      { charflag[0]=temp[j].name;
        indexmin=j;
       }
     }
     strcpy(newinfo.num,temp[i].num);  /*利用结构变量newinfo实现数组元素的交换*/
     strcpy(newinfo.name,temp[i].name);
     strcpy(newinfo.phonenum,temp[i].phonenum);
     strcpy(newinfo.address,temp[i].address);

     strcpy(temp[i].num,temp[indexmin].num);
     strcpy(temp[i].name,temp[indexmin].name);
     strcpy(temp[i].phonenum,temp[indexmin].phonenum);
     strcpy(temp[i].address,temp[indexmin].address);

     strcpy(temp[indexmin].num,newinfo.num);
    strcpy(temp[indexmin].name,newinfo.name);
    strcpy(temp[indexmin].phonenum,newinfo.phonenum);
    strcpy(temp[indexmin].address,newinfo.address);
    }
      Disp(temp,n);  /*显示排序后的所有记录*/
      saveflag=1;
      printf("\n    =====>sort complete!\n");
      getchar();
      return;
  }
  else
  {Wrong();
   getchar();
   getchar();
   return;}

}




/*数据存盘,若用户没有专门进行此操作且对数据有修改，在退出系统时， 会提示用户存盘*/
void Save(TELEBOOK temp[],int n)
{
FILE* fp;
int i=0;
fp=fopen("c:\\telephon","w");/*以只写方式打开文本文件*/
if(fp==NULL) /*打开文件失败*/
{
  printf("\n=====>open file error!\n");
  getchar();
  return ;
}
for(i=0;i<n;i++)
{
  if(fwrite(&temp[i],sizeof(TELEBOOK),1,fp)==1)/*每次写一条记录或一个结构数组元素至文件*/
  { 
   continue;
  }
  else
  {
   break;
  }
}
if(i>0)
{
  getchar();
  printf("\n\n=====>save file complete,total saved's record number is:%d\n",i);
  getchar();
  saveflag=0;
}
else
{system("cls");
 printf("the current link is empty,no telephone record is saved!\n");
 getchar();
 }
fclose(fp); /*关闭此文件*/
}


void main()
{
  TELEBOOK tele[N];         /*定义TELEBOOK结构体*/
  FILE *fp;           /*文件指针*/
  int select;         /*保存选择结果变量*/
  char ch;            /*保存(y,Y,n,N)*/
  int count=0;        /*保存文件中的记录条数（或元素个数）*/
   
  fp=fopen("C:\\telephon","a+");
  /*以追加方式打开文本文件c:\telephon，可读可写，若此文件不存在，会创建此文件*/
  if(fp==NULL)
  {
    printf("\n=====>can not open file!\n");
    exit(0);
  }

while(!feof(fp))
{
   if(fread(&tele[count],sizeof(TELEBOOK),1,fp)==1) /*一次从文件中读取一条电话簿记录*/
      count++;
}
fclose(fp); /*关闭文件*/
printf("\n==>open file sucess,the total records number is : %d.\n",count);
getchar();
menu();
while(1)
{
   system("cls");
   menu();
   printf("\n              Please Enter your choice(0~8):");    /*显示提示信息*/
   scanf("%d",&select);

  if(select==0)
  {
   if(saveflag==1) /*若对数组的数据有修改且未进行存盘操作，则此标志为1*/
   { getchar();
     printf("\n==>Whether save the modified record to file?(y/n):");
     scanf("%c",&ch);
     if(ch=='y'||ch=='Y')
       Save(tele,count);
   }
   printf("\n===>thank you for useness!");
   getchar();
   break;
  }

  switch(select)
  {
  case 1:count=Add(tele,count);break;       /*增加电话簿记录*/
  case 2:system("cls");Disp(tele,count);break;   /*显示电话簿记录*/
  case 3:count=Del(tele,count);break;      /*删除电话簿记录*/
  case 4:Qur(tele,count);break;           /*查询电话簿记录*/
  case 5:Modify(tele,count);break;        /*修改电话簿记录*/
  case 6:count=Insert(tele,count);break;  /*插入电话簿记录*/
  case 7:SelectSort(tele,count);break;        /*排序电话簿记录*/
  case 8:Save(tele,count);break;        /*保存电话簿记录*/
  default: Wrong();getchar();break;        /*按键有误，必须为数值0-9*/
  }
 }
}