简易 (I/O)版本通讯录

 #include <stdio.h>
 #include<assert.h>
 //#include<malloc.h>
 #include<string.h>
 #include<windows.h>

 #define MailSize 100
 #define MaxName 10
 #define MaxAdress 20
 #define MaxPhone 20

 struct Person{
     char name[MaxName];
     int age;
     char sex;
     char adress[MaxAdress];
     char phone[MaxPhone];
 };
 typedef struct Mail{
     int ExistNum;
     //int MaxNum;
     struct Person peo[MailSize];
 }ML,*MailList;

 enum mem_infor{
     Name=,
     Age,
     Sex,
     Adress,
     Phone,
 };
 void Show_member(MailList s){
     int i=;
     if( == s->ExistNum){
         printf("Mail is Null!");
         return ;
     }
     printf("-------------------------------------------------\n");
     printf("|Name  | Age| Sex  |Adress           |  Phone   |   \n");

     while(i<s->ExistNum){
        printf("%-10s",s->peo[i].name);
        printf("%-5d",s->peo[i].age);
        printf("%-5c",s->peo[i].sex);
        printf("%-20s",s->peo[i].adress);
        printf("%-20s",s->peo[i].phone);
        printf("\n");
        i++;
     }

 }
 void Add_member(MailList s,int num){
     char na[],sex,adr[],pho[];
     int a;
     printf("\nInput: Name + Age + Sex(M/W) + Adress + Phone：>\n");
     for(int i=s->ExistNum;i<s->ExistNum+num;++i){
         scanf("%s  %d  %c  %s  %s",na,&a,&sex,adr,pho);
         strcpy(s->peo[i].name,na);
         s->peo[i].age=a;
         s->peo[i].sex=sex;
         strcpy(s->peo[i].adress,adr);
         strcpy(s->peo[i].phone,pho);
     }
     s->ExistNum+=num;
     printf("\nAdd Successful!\n");
 }
 int Research_member(const MailList s,char *na){
     assert(na);
     assert(s);
     for(int i=;i<s->ExistNum;++i){
         if(!strcmp(s->peo[i].name,na) )
         return i;
     }
     return -;
 }
 void  Delet_member(MailList s,char *na){
     assert(s);
     assert(na);
     int locate=Research_member(s,na);
     if(locate<) {
         printf("\nDelet failed !");
         return ;
     }
     for(int i=locate;i<s->ExistNum;++i){
         s->peo[i]=s->peo[i+];
     }
     s->ExistNum--;
     printf("Delet Successful!\n");
 }
 void swap(struct Person* p1,struct Person* p2){
     struct Person tmp;
     tmp=*p1;
     *p1=*p2;
     *p2=tmp;
 }
 void Sort_member(MailList s){
     assert(s);
     MailList ret=s;
     for(int i=;i<s->ExistNum-;++i){
         for(int j=i;j<s->ExistNum;++j){
             if(strcmp(ret->peo[i].name,ret->peo[j].name)> )
             swap(&ret->peo[i],&ret->peo[j]);   //交换两个结构体
         }
     }
     printf("\nSort Successful !");
  }

 void Clear_member(MailList s){
     s->ExistNum=;
     printf("\nClear.....");
     Sleep();
     printf("\nClear finished!");
 }
 void Modify_member(MailList s){
     assert(s);
     char na[],sex,adr[],pho[];
     int a,option,locate;
     if(s->ExistNum <= ){
         printf("通讯录为空，无法修改！");
         return;
     }
     printf("\n选择修改位置：");
      scanf("%d",&locate);
     if(locate < s->ExistNum && locate>=){
         printf("******************************\n");
         printf("* 1--姓名   2--年龄  3--性别 *\n");
         printf("* 4--住址            5--电话 *\n");
         printf("******************************\n");
         choose:
         printf("\n请选择修改：>");
         scanf("%d",&option);
         switch(option){
             case Name:{
                 printf("\n姓名修改为：");
                 scanf("%s",na);
                 strcpy(s->peo[locate].name,na);
                 break;
             }
             case Age:{
                 printf("年龄修改为：");
                 scanf("%d",&a);
                 s->peo[locate].age=a;
                 break;
             }
             case Sex:{
                 printf("性别修改为：");
                 scanf("%c",&sex);
                 s->peo[locate].sex=sex;
                 break;
             }
             case Adress:{
                 printf("住址修改为：");
                 scanf("%s",adr);
                 strcpy(s->peo[locate].adress,adr);
                 break;
             }
             case Phone:{
                 printf("\n电话修改为：");
                 scanf("%s",pho);
                 strcpy(s->peo[locate].phone,pho);
                 break;
             }
             default:
                 printf("\n选择错误！");
                 goto choose    ;
         }
         printf("\nSuccessful !");
     }
     else{
         printf("\n无法修改！");
     }
 }
 void LoadFile(MailList s){
     int i=;
     FILE *rfp=fopen("MailList.bin","rb");  //读取二进制文件
     if(rfp == NULL){
         perror("open faild");
         exit();
     }
     struct Person tmp = {};
     while(fread(&tmp,sizeof(struct Person),,rfp)){
       s->peo[i] = tmp;
        i++;
     }
     if( == i){
         printf("空文件！");
     }
     else{
         s->ExistNum = i;
         Show_member(s);
     }
     fclose(rfp);
 }
 void SaveToFile(MailList s){
     FILE *wfp=fopen("MailList.bin","wb");   //为文件写入二进制流
     if(wfp == NULL){
         perror("NULL ");
         exit();
     }
     for(int i=;i<s->ExistNum;++i){
         fwrite(&s->peo[i],sizeof(struct Person),,wfp);
     }
     printf("Save Success!");
     fclose(wfp);
 }
 int main(){

     ML mail;
     mail.ExistNum = ;    //初始化为0
     int option;
     printf("  \t****************** MailList **********************\n");
     printf("  \t* 1--Input Information      2--Delet Information * \n");
     printf("  \t* 3--Search Information     4--Show  Information *\n");
     printf("  \t* 5--Sort                   6--Clear Information *\n");
     printf("  \t* 7--Modify Information     8--Save              *\n");
     printf("  \t* 9--Load Information       0--Eixt              *\n");
     printf("  \t**************************************************\n");
     while(){
         printf("\nPlease Choose:");
         scanf("%d",&option);
         switch(option){
           case :
           {
             int num;
             printf("\n录入人数：");scanf("%d",&num);
             Add_member(&mail,num);
           }
           break;
            case :{
                char na[];
                printf("\n输入删除人名：");
                scanf("%s",na);
                Delet_member(&mail,na);
                break;
             }
            case :{
                char na[];
                printf("\n输入查找人名：");
                scanf("%s",na);
                int ret=Research_member(&mail,na);
                if(ret<)
                  printf("\n没找到！");
                else
                  printf("\n找到了！位置在：%d",ret);
                break;
              }
             case :
                 Show_member(&mail);
                 break;
             case :
                 Sort_member(&mail);
                  break;
             case :
                 Clear_member(&mail);
                 break;
             case :
                 Modify_member(&mail);
                 break;
             case :
                 SaveToFile(&mail);
                 break;
             case :
                 LoadFile(&mail);
                 break;
             case :
                 exit();
                 break;
             default:
                 break ;
         }
    }
     return ;
 } 

比较挫版本。