指针实现通讯录

#ifndef __CONTACT_H__
#define __CONTACT_H__

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

typedef struct peole
{
	char *name;
	char *sex;
	int  age;
	char *tele;
	char *addr;
}peo ;
typedef struct Contact
{
	peo *dhb;
	int count;
}Pcon ;

void menu();
void add_peo(Pcon *pcon);
void del_peo(Pcon *pcon);
void search_peo(Pcon *pcon);
void modify_peo(Pcon *pcon);
void show_peo(Pcon *pcon);
void clear_peo(Pcon *pcon);
int find(char *p, Pcon *pcon);

#endif  

#include "contact.h"
#include<stdio.h>
#include<stdlib.h>
void menu()
{
	printf("************************\n");
	printf("*   1>add	   2>del   *\n");
	printf("*	3>search   4>modify*\n");
	printf("*	5>show	   6>clear *\n");
	printf("************************\n");
}
int find(char *p, Pcon *pcon)
{
  int i=0;
  for(i=0;i<pcon->count;i++)
   {
     if(strcmp(p,(pcon->dhb[i].name))==0)
          return i;
   }
  return -1;
}
void add_peo(Pcon *pcon)
{
 if(pcon->count<1000)
  {
    printf("请输入名字：");
    scanf("%s",pcon->dhb[pcon->count].name=(char *)malloc(20*sizeof(char)));
    printf("请输入年龄：");
    pcon->dhb[pcon->count].age=(int)malloc(2*sizeof(int));
    scanf("%d",&(pcon->dhb[pcon->count].age));
    printf("请输入性别：");
    scanf("%s",pcon->dhb[pcon->count].sex=(char *)malloc(10*sizeof(char)));
    printf("请输入电话：");
    scanf("%s",pcon->dhb[pcon->count].tele=(char *)malloc(13*sizeof(char)));
    printf("请输入地址：");
    scanf("%s",pcon->dhb[pcon->count].addr=(char *)malloc(10*sizeof(char)));
    pcon->count++;
    printf("添加成功！");
 }
  else
  {
      printf("电话本已满！"); 
      return;  
  }
}
void del_peo(Pcon *pcon)
{  
    int ret;
   char *name=(char  *)malloc(20*sizeof(char)+1);
   printf("请输入要删除人的名字:");
   scanf("%s",name);
   ret=find(name,pcon);
   if(ret==-1)
   {
     printf("要删除的人不存在!");
	 return;
   }
   else
   {
     int index=0;
     for(index=ret;index<pcon->count;index++)
	 {
	   pcon->dhb[index]=pcon->dhb[index+1];
	 }
	 pcon->count--;
   }
}
void search_peo(Pcon *pcon)
{
   int ret;
   char * name=(char *)malloc(20*sizeof(char)+1);
   printf("请输入要查找人的名字:");
   scanf("%s",name);
   ret=find(name,pcon);
   if(ret!=-1)
  {
   printf("%12s ",pcon->dhb[ret].name);
   printf("%12s ",pcon->dhb[ret].sex);
   printf("%12d ",pcon->dhb[ret].age);
   printf("%12s ",pcon->dhb[ret].tele);
   printf("%12s ",pcon->dhb[ret].addr);
  }
}
void modify_peo(Pcon *pcon)
{
   int ret;
   char *name=(char *)malloc(20*sizeof(char)+1);
   printf("请输入要修改人的名字:");
   scanf("%s",name);
   ret=find(name,pcon);
   if(ret!=-1)
  {
   printf("请输入名字:");
   scanf("%s",pcon->dhb[ret].name);
   printf("请输入性别:");
   scanf("%s",pcon->dhb[ret].sex);
   printf("请输入年龄:");
   scanf("%d",&(pcon->dhb[ret].age));
   printf("请输入电话:");
   scanf("%s",(pcon->dhb[ret]).tele);
   printf("请输入地址:");
   scanf("%s",(pcon->dhb[ret]).addr);
  }
}
void show_peo(Pcon *pcon)
{
	int i=0;
   for(i=0;i<pcon->count;i++)
   {
      printf("%12s ",pcon->dhb[i].name);
	  printf("%12s ",pcon->dhb[i].sex);
	  printf("%12d ",pcon->dhb[i].age);
	  printf("%12s ",pcon->dhb[i].tele);
	  printf("%12s ",pcon->dhb[i].addr);
   }
   printf("\n");
}
void clear_peo(Pcon *pcon)
{
   pcon->count=0;
}

#include "contact.h"

int main()
{
	Pcon my_contact;
    int input = 1;
	my_contact.dhb = (peo*)malloc(1000*sizeof(peo));
	my_contact.count=0;//先赋个初值
	while(input)
	{
		menu();
		printf("请选择>");
		scanf("%d",&input);
		switch(input)
		{
		case 1:
			add_peo(&my_contact);
			break;
		case 2:
			del_peo(&my_contact);
			break;
		case 3:
			search_peo(&my_contact);
			break;
		case 4:
			modify_peo(&my_contact);
			break;
		case 5:
			show_peo(&my_contact);
			break;
		case 6:
			clear_peo(&my_contact);
			break;
		}
	}
	free(my_contact.dhb);
	return 0;
}