#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<stdlib.h>
#include<ctype.h>
#define STACK_INIT_SIZE 10
#define OK 1
#define N 5
#define TRUE 1
#define FALSE 0
#define ERROR 0
struct employ /*定义职工类型*/
{
int employnum;
char employname[15];
int employage;
char employsex[2];
long int employtage;
}memploy[50];
addemploy()
{
    FILE *fp1;
    char choice='1';
    int i=1;
    fp1=fopen("employ.txt","a+");
    while(choice=='1')
    {
       printf("请你输入职工号码\n");
       scanf("%d",&memploy[i].employnum);
       printf("请你输入职工名\n");
       scanf("%s",memploy[i].employname);
       printf("请输入职工年龄\n");
       scanf("%d",&memploy[i].employage);
       printf("请你输入性别\n");
       scanf("%s",memploy[i].employsex);
       printf("请输入职工的工资\n");
       scanf("%d",&memploy[i].employtage);
       fprintf(fp1,"%d %s %d %s %d\n",memploy[i].employnum,memploy[i].employname,
           memploy[i].employage,memploy[i].employsex,memploy[i].employtage);
       printf("是否要输入下个职工信息？\n");
       scanf("%s",&choice);
    }
    printf("按任意键返回\n");
    fclose(fp1);
}
delemploy()
{
FILE *fp,*fp2;
int i;
char employname[10],choice;
fp=fopen("employ.txt","r");
fp2=fopen("bookl.txt","w");
printf("请输入你要删除的职工名\n");
printf("如果你输入的职工存在，系统自动删除该信息！如果不存在，系统不做任何改动\n");
scanf("%s",employname);
for(i=0;fread(&memploy[i],sizeof(struct employ),1,fp)!=0;i++)
{
   if(strcmp(employname,memploy[i].employname)!=0)
   {
    fprintf(fp2,"%d %s %d %s %d\n",memploy[i].employnum,memploy[i].employname,
           memploy[i].employage,memploy[i].employsex,memploy[i].employtage);  
   }
}
fclose(fp);
fclose(fp2);
printf("是否真的要删除该职工信息？删除后的所有信息将无法恢复《Y/N》\n");
scanf("%s",&choice);
if(choice=='y'||choice=='Y')
{
   fp=fopen("employ.txt","w");
   fp2=fopen("bookl.txt","r");
   for(i=0;fread(&memploy[i],sizeof(struct employ),1,fp2)!=0;i++)
   {
    fprintf(fp,"%d %s %d %s %d\n",memploy[i].employnum,memploy[i].employname,
           memploy[i].employage,memploy[i].employsex,memploy[i].employtage);
   }
   fclose(fp);
   fclose(fp2);
   fp2=fopen("bookl.txt","w");
   fclose(fp2);
   printf("按任意键返回\n");
   getch();
   return TRUE;
}
else
{
printf("按任意键返回\n");
getch();
return FALSE;
}
}
void main()
{
addemploy();
delemploy();
}
}

struct employ /*定义职工类型*/
{
int employnum;
char employname[15];
int employage;
char employsex[2];
long int employtage;
}memploy[50];
addemploy()
{
    FILE *fp1;
    char choice='1';
    int i=1;
    fp1=fopen("employ.txt","a+");
    while(choice=='1')
    {
       printf("请你输入职工号码\n");
       scanf("%d",&memploy[i].employnum);
       printf("请你输入职工名\n");
       scanf("%s",memploy[i].employname);
       printf("请输入职工年龄\n");
       scanf("%d",&memploy[i].employage);
       printf("请你输入性别\n");
       scanf("%s",memploy[i].employsex);
       printf("请输入职工的工资\n");
       scanf("%d",&memploy[i].employtage);
       fprintf(fp1,"%d %s %d %s %d\n",memploy[i].employnum,memploy[i].employname,
           memploy[i].employage,memploy[i].employsex,memploy[i].employtage);
       printf("是否要输入下个职工信息？\n");
       scanf("%s",&choice);
    }
    printf("按任意键返回\n");
    fclose(fp1);
}
bool delemploy() //?????
{
FILE *fp,*fp2;
int i;
char choice;   //aaaaaaa
char employname[20];  //aaaaaa
fp=fopen("employ.txt","r");
fp2=fopen("bookl.txt","w");
printf("请输入你要删除的职工名\n");
printf("如果你输入的职工存在，系统自动删除该信息！如果不存在，系统不做任何改动\n");
scanf("%s",employname); //?????
for(i=0;fread(&memploy[i],sizeof(struct employ),1,fp)!=0;i++)
{
   if(strcmp(employname,memploy[i].employname)!=0)
   {
    fprintf(fp2,"%d %s %d %s %d\n",memploy[i].employnum,memploy[i].employname,
           memploy[i].employage,memploy[i].employsex,memploy[i].employtage); 
   }
}
fclose(fp);
fclose(fp2);
printf("是否真的要删除该职工信息？删除后的所有信息将无法恢复《Y/N》\n");
scanf("%s",&choice);
if(choice=='y'||choice=='Y')
{
   fp=fopen("employ.txt","w");
   fp2=fopen("bookl.txt","r");
   for(i=0;fread(&memploy[i],sizeof(struct employ),1,fp2)!=0;i++)
   {
    fprintf(fp,"%d %s %d %s %d\n",memploy[i].employnum,memploy[i].employname,
           memploy[i].employage,memploy[i].employsex,memploy[i].employtage);
   }
   fclose(fp);
   fclose(fp2);
   fp2=fopen("bookl.txt","w");
   fclose(fp2);
   printf("按任意键返回\n");
   getch();
   return TRUE;
}
else
{
printf("按任意键返回\n");
getch();
return FALSE;
}
}
void main()
{
addemploy();
delemploy();
}  //?????

最后一行多了个大括号，另外函数addemploy();和delemploy();的类型和返回值没有对应起来。
定义函数的时候不需要指明类型吗？？
改后增加、删除员工的基本功能已经能够实现。

谢谢

我刚试了一下，最后文件打开的是错误的