#include<stdio.h>
#include<string.h>
#include<windows.h>
struct student
{  
  char name[20];  
  char adress[20],phone[20];
  int yb;  
}stu[3];
void output();
void add();  
void find();
void del();
void change();
int main()
{  
  int i,j=1,k;
 
printf("\n\n******************欢  迎  光  临  学  生  通  讯  录  管  理  系  统 *********************\n\n\n");
 
printf("            1.输出通讯录\n\n");
printf("            2.删除记录\n\n");
printf("            3.查找记录\n\n");
printf("            4.修改记录\n\n");
printf("            5.添加新联系人\n\n");
printf("            6.退出程序\n\n\n");
printf("*****************************************************************\n\n");
while(j!=0)  
{
printf("请输入序号：");
scanf("%d",&i);
if(i==1)
    output();
if(i==2)
    del();
if(i==3)
    find();
if(i==4)  
    change();
if(i==5)
    add();
if(i==6)
    break;  
printf("\n\n\n您是否要继续使用学生通讯录管理系统？输入“0”结束程序，非0继续:\n\n\n");
scanf("%d",&j);
if(j!=0)
{
printf("\n\n******************欢迎光临学生通讯录管理系统*********************\n\n\n");

printf("            1.输出通讯录\n\n");
printf("            2.删除记录 \n\n");
printf("            3.查找记录\n\n");
printf("            4.修改记录\n\n");  
printf("            5.添加新联系人\n\n");  
printf("            6.退出程序\n\n\n");
printf("*****************************************************************\n\n");
}
 
 
}
getchar();
return 0;  
}
void add()
{  
  FILE*fp;
  int i=1,j,k;
  char ch,str[20];
  if((fp=fopen("1.txt","ab+"))==NULL)
{
    fp=fopen("1.txt","wb+");
    while(i!=0)
    {
      printf("请输入姓名：\n");
      scanf("%s",stu[0].name);
      printf("请输入地址：\n");
      scanf("%s",stu[0].adress);
      printf("请输入邮编：\n");
      scanf("%d",&stu[0].yb);
      getchar();
      printf("请输入电话号码：\n");
      scanf("%s",stu[0].phone);  
      fwrite(&stu[0],sizeof(struct student),1,fp);
      printf("信息已经输入成功输入数据库，是否继续输入？？\n 按数字“0”退出，非“0”继续");
      scanf("%d", &i);
    }
 }
 else
 {
      fclose(fp);
      fp=fopen("1.txt","ab+");
      i=1;
      while(i!=0)
{
      printf("请输入姓名：\n");
      scanf("%s",stu[0].name);
      printf("请输入地址：\n");
      scanf("%s",stu[0].adress);
      printf("请输入邮编：\n");
      scanf("%d",&stu[0].yb);
      getchar();
      printf("请输入电话号码：\n");
      scanf("%s",stu[0].phone);
      fwrite(&stu[0],sizeof(struct student),1,fp);
      printf("信息已经输入成功输入数据库，是否继续输入？？\n 按数字“0”退出，非“0”继续");
      scanf("%d", &i);
      }
 }
 fclose(fp);
}
void output()
{
   FILE*fp;
   char ch;
   int i=1;
   if((fp=fopen("1.txt","rb"))==NULL)
{
    printf("目前数据库中还没有任何数据！！\n\n");
    exit(0);
}
printf(" **************************************************************\n\n\n");
read(&stu[0],sizeof(struct student),1,fp);
while(!feof(fp))  
  {
    printf("    姓名:%-8s 地址:%-10s 邮编:%-8d 电话号码:%-8s\n\n",stu[0].name,stu[0].adress,stu[0].yb,stu[0].phone);
    fread(&stu[0],sizeof(struct student),1,fp);
 
}
printf("\n\n *************************************************************\n\n");
fclose(fp);
}
void find()
{  
   FILE*fp;
   char name[20][20];
   int i=0,j=1,m=0;
   if((fp=fopen("1.txt","rb"))==NULL)
 {
       printf("目前数据库中还没有任何数据！！\n\n");
       exit(0);
 }
   while(j!=0)
 {
       fp=fopen("1.txt","rb");
       printf("\n\n输入你想查询的姓名：");
       scanf("%s",name[m]);
       fread(&stu[0],sizeof(struct student),1,fp);
       while(!feof(fp))
 {
         if(strcmp(stu[0].name,name[m])==0)
         {
               i++;
               printf(" **************************************************************\n\n\n");
               printf(" 姓名:%-8s 地址:%-10s 邮编:%-8d 电话号码:%-8s\n\n",stu[0].name,stu[0].adress,stu[0].yb,stu[0].phone);
               printf("\n\n\n *************************************************************\n\n");
         }
         fread(&stu[0],sizeof(struct student),1,fp);
}
         if(i==0)  
         printf("\n\n不好意思，没有找到您的数据！O(∩_∩)O\n\n");
         i=0;
         printf("是否要继续查询？按“0”退出，非0继续\n\n");  
         scanf("%d",&j);
         m++;
}  
         fclose(fp);
}
void del()
{  
    FILE*fp1,*fp2;  
    char name[20][20];  
    int i=0,j=1,k=1,m=0;  
    if((fp1=fopen("1.txt","rb"))==NULL)  
{   printf("目前数据库中还没有任何数据！！\n\n");   
    exit(0);  
}  
    while(j!=0)  
{   
    fp1=fopen("1.txt","rb");   
    printf("\n\n输入你想删除信息的人的姓名：");      
    scanf("%s",name[m]);      
    fread(&stu[0],sizeof(struct student),1,fp1);   
    while(!feof(fp1))      
{      
    if(strcmp(stu[0].name,name[m])==0)      
{        
    i++;        
    printf("\n\n           姓名:%-8s 地址:%-10s 邮编:%-8d 电话号码:%-8s\n\n",stu[0].name,stu[0].adress,stu[0].yb,stu[0].phone);        
    printf("以上为您要查询的信息，确认删除吗？按“0”键确认，非0取消");     
    scanf("%d",&k);      
    break;      
}         
    fread(&stu[0],sizeof(struct student),1,fp1);      
}
    if(i==0)              
    printf("\n\n不好意思，没有找到您的数据！O(∩_∩)O\n\n");         
    if(k==0)   
{   
    fclose(fp1);   
    fp1=fopen("1.txt","rb");      
    fp2=fopen("2.txt","wb+");   
    fread(&stu[0],sizeof(struct student),1,fp1);      
    if(strcmp(stu[0].name,name[m])==0)   
{
    fread(&stu[0],sizeof(struct student),1,fp1);      
    while(!feof(fp1))      
{        
    fwrite(&stu[0],sizeof(struct student),1,fp2);              
    fread(&stu[0],sizeof(struct student),1,fp1);      
}   
}                                                   
    else   
{     
    while(!feof(fp1))     
{         
    fwrite(&stu[0],sizeof(struct student),1,fp2);         
    fread(&stu[0],sizeof(struct student),1,fp1);         
    if(strcmp(stu[0].name,name[m])==0)         
{         
    fread(&stu[0],sizeof(struct student),1,fp1);         
}     
}   
}                     
    fclose(fp1);   
    fp1=fopen("1.txt","wb+");   
    rewind(fp2);                        
    fread(&stu[0],sizeof(struct student),1,fp2);     
    while(!feof(fp2))   
{     
    fwrite(&stu[0],sizeof(struct student),1,fp1);     
    fread(&stu[0],sizeof(struct student),1,fp2);     
}   
    fclose(fp1);   
    fclose(fp2);                    
    DeleteFile("2.txt");                                                     
}   
    fclose(fp1);         
    printf("是否要继续删除？按“0”退出，非0继续\n\n");   
    scanf("%d",&j);   
    i=0;   
    m++;  
}  
    fclose(fp1);
}
void change()
{
    FILE*fp1,*fp2;  
    char name[20][20],newname[20][20],newadress[20][20];  
    int i=0,j=1,k=1,num,newyb,m=0;  char newphone[20][20];  
    if((fp1=fopen("1.txt","rb"))==NULL)  
{   
    printf("目前数据库中还没有任何数据！！\n\n");   
    exit(0);  
}  
    while(j!=0)  
{   
    fp1=fopen("1.txt","rb");   
    printf("\n\n输入你想修改信息的人的姓名：");      
    scanf("%s",name[m]);                  
    fread(&stu[0],sizeof(struct student),1,fp1);   
    while(!feof(fp1))      
{      
    if(strcmp(stu[0].name,name[m])==0)      
{        
    i++;         
    printf("%s    %s    %d    %s\n",stu[0].name,stu[0].adress,stu[0].yb,stu[0].phone);        
    printf("\n\n以上为您要修改的信息，确认修改吗？按“0”键确认修改，非0取消\n\n");     
    scanf("%d",&k);        
}     
    fread(&stu[0],sizeof(struct student),1,fp1);      
}      
    if(i==0)              
    printf("\n\n不好意思，没有找到您的数据！O(∩_∩)O\n\n");         
    if(k==0)   
{   
    fclose(fp1);   
    fp1=fopen("1.txt","rb");            
    fp2=fopen("2.txt","wb+");   
    fread(&stu[0],sizeof(struct student),1,fp1);     
    if(strcmp(stu[0].name,name[m])==0)   
{         
    stu[1].name=stu[0].name;           
    stu[1].adress=stu[0].adress;      
    stu[1].phone=stu[0].phone;      
    stu[1].yb=stu[0].yb;      
    fread(&stu[0],sizeof(struct student),1,fp1);      
    while(!feof(fp1))
 {        
    fwrite(&stu[0],sizeof(struct student),1,fp2);              
    fread(&stu[0],sizeof(struct student),1,fp1);      
}   
}                                                
    else   
{     
    while(!feof(fp1))     
{         
    fwrite(&stu[0],sizeof(struct student),1,fp2);         
    fread(&stu[0],sizeof(struct student),1,fp1);         
    if(strcmp(stu[0].name,name[m])==0)         
{         
    stu[1].name=stu[0].name;               
    stu[1].adress=stu[0].adress;         
    stu[1].phone=stu[0].phone;         
    stu[1].yb=stu[0].yb;                        
    fread(&stu[0],sizeof(struct student),1,fp1);         
}     
}   
}                          
    fclose(fp1);   
    fp1=fopen("1.txt","wb+");   
    rewind(fp2);                        
    fread(&stu[0],sizeof(struct student),1,fp2);     
    while(!feof(fp2))   
{     
    fwrite(&stu[0],sizeof(struct student),1,fp1);     
    fread(&stu[0],sizeof(struct student),1,fp2);      
}   
    fclose(fp1);   
    fclose(fp2);                    
    DeleteFile("2.txt");           
    fp1=fopen("1.txt","ab");         
    printf("输入你想要改变的项目：\n       ");   
    lable:    printf("1.更改姓名    2.更改住址    3.更改邮编    4.更改联系方式");   
              scanf("%d",&num);   
              switch(num)   
{     case 1:         printf("请输入新的姓名：");      
                      scanf("%s",newname[m]);      
                      stu[1].name=newname[m];
                      fwrite(&stu[1],sizeof(struct student),1,fp1);      
                      fclose(fp1);      
                      break;      
      case 2:               
                      printf("请输入新的住址：");               
                      scanf("%s",newadress[m]);               
                      stu[1].adress=newadress[m];               
                      fwrite(&stu[1],sizeof(struct student),1,fp1);               
                      fclose(fp1);               
                      break;                  
      case 3:                     
                      printf("请输入新的邮编：");                     
                      scanf("%d",&newyb);                     
                      stu[1].yb=newyb;                     
                      fwrite(&stu[1],sizeof(struct student),1,fp1);                     
                      fclose(fp1);                     
                      break;                  
      case 4:                     
                      printf("请输入新的联系方式：");                     
                      scanf("%s",newphone[m]);                     
                      stu[1].phone=newphone[m];                     
                      fwrite(&stu[1],sizeof(struct student),1,fp1);                     
                      fclose(fp1);                     
                      break;                  
       default:                     
                      printf("请正确输入！！");                     
                      fclose(fp1);      
                      goto lable;     
}                                 
}           
  printf("是否要继续修改人员信息？按“0”退出，非0继续\n\n");   
  scanf("%d",&j);   
  i=0;   
  m++;  
}
}

D:\14263728\tongxunlu.cpp(17) : warning C4101: 'k' : unreferenced local variable
D:\14263728\tongxunlu.cpp(68) : warning C4101: 'str' : unreferenced local variable
D:\14263728\tongxunlu.cpp(68) : warning C4101: 'ch' : unreferenced local variable
D:\14263728\tongxunlu.cpp(67) : warning C4101: 'j' : unreferenced local variable
D:\14263728\tongxunlu.cpp(67) : warning C4101: 'k' : unreferenced local variable
D:\14263728\tongxunlu.cpp(122) : error C2065: 'read' : undeclared identifier
D:\14263728\tongxunlu.cpp(282) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(283) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(284) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(301) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(302) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(303) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(328) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(335) : error C2106: '=' : left operand must be l-value
D:\14263728\tongxunlu.cpp(349) : error C2106: '=' : left operand must be l-value
Error executing cl.exe.

tongxunlu.exe - 10 error(s), 5 warning(s)

错误应该怎么改！求大侠给出正确答案！谢谢！