#include<stdlib.h>
#include<string.h>
#include<ctype.h>
#include<stdio.h>
#include "graphics.h"
#include "conio.h"
#include "dos.h"
#define maxworker 100
FILE *fp;  /*定義全局變量fp，指向數據庫文件 worker.txt*/

struct date1{      /*日期的結構，用于存儲工人的生日，工作日期等*/
  int year;
  int month;
  int day;
};
struct address {  /*地址的結構， 用于存儲工人的地址*/
  char province[10];
  char city[10];
  char street[20];
};
struct WORKER {       /*工人的資料總結構*/
 char name[20];
 enum {male,female}sex;
 struct date1 birthday;
 enum {elesch,middle,high,university,other}rofs;
 struct date1 workday;
 int workeri;
 char position[20];
 struct address addr;
 int workerj;
 char tel[13];
 };
/*程序的初始化函數，用于從數據庫中讀出現存的資料到內存中*/
void data_load(int *i,struct WORKER *p){
 char c;
 long int k;
 fp=fopen("worker.txt","r");
 if(!fp){fopen("worker.txt","w+");*i=0;}
 else{
 for((*i)=0;(*i)<maxworker;(*i)++){
  if(feof(fp)) return;
  c=fgetc(fp);
  if(c==EOF) return;
  fflush(stdin);
  k=*i;
  fseek(fp,k*sizeof(struct WORKER),SEEK_SET);
  fread(&p[*i],sizeof(struct WORKER),1,fp);
  }
 }
void modify(int i,struct WORKER *mp){
 char mod_name[20];
 char temp[20];
 int mi;
 enum {false,true}status;
 status=false;
 printf("Enter the worker's name to modify:");
 scanf("%s",mod_name);

 /*調用search函數（在上面已經聲明了的），搜索到的話就返回工人的id，沒有的話就返回-1*/
 if((mi=search(i,mp,1,mod_name))==-1)return;

 /*下面的處理跟添加一個工人的資料的處理一模一樣，比較繁*/

 printf("\nNow modify %s's profile...\n",mod_name);
  while(status==false){
  printf("Enter the name of the worker:");
  scanf("%s",mp[mi].name);
     if(strlen(mp[mi].name)==0 || strlen(mp[mi].name)>20){
	 status=false;puts("input error,name cannot over 8 character or less than 0 character!");
	 continue;
     }
     else
	status=true;
  printf("Enter the gender of worker:(1=>female,0=>male)");
  scanf("%d",&mp[mi].sex);
     if(mp[mi].sex!=0 && mp[mi].sex!=1){
	 status=false;puts("only 0 or 1 can be accepted!");
	 continue;
     }
     else
	status=true;
  printf("Enter the birthday of worker:\n");
  printf("\tYear:");
  scanf("%4d",&mp[mi].birthday.year);
     if(mp[mi].birthday.year>9999 || mp[mi].birthday.year<0){
	 status=false;puts("input error,the year of birthday cannot more than 9999 or less than 0!");
	 continue;
      }
     else
	status=true;
printf("\tMonth:");
  scanf("%2d",&mp[mi].birthday.month);
     if(mp[mi].birthday.month>12 || mp[mi].birthday.month<1){
	 status=false;puts("input error,the month of birthday cannot be more than 12 or less than 1");
	 continue;
      }
     else
	status=true;
printf("\tDay:");
  scanf("%2d",&mp[mi].birthday.day);
     if(mp[mi].birthday.day>31 || mp[mi].birthday.day<1){
	 status=false;puts("input error,the year of birthday cannot be more than 31 or less than 1!");
	 continue;
      }
     else
	status=true;

  printf("Enter the workday of worker:\n");
    printf("\tYear:");
  scanf("%4d",&mp[mi].workday.year);
     if(mp[mi].workday.year>9999 || mp[mi].workday.year<0){
	 status=false;puts("input error,the year of workday cannot more than 9999 or less than 0!");
	 continue;
      }
     else
	status=true;
printf("\tMonth:");
  scanf("%2d",&mp[mi].workday.month);
     if(mp[mi].workday.month>12 || mp[mi].workday.month<1){
	 status=false;puts("input error,the month of workday cannot be more than 12 or less than 1");
	 continue;
      }
     else
	status=true;
printf("\tDay:");
  scanf("%2d",&mp[mi].workday.day);
     if(mp[mi].workday.day>31 || mp[mi].workday.day<1){
	 status=false;puts("input error,the year of workday cannot be more than 31 or less than 1!");
	 continue;
      }
     else
	status=true;
  printf("Enter the record of formal schooling of worker:(0=>element school,1=>middle school,2=>high school,3=>university,4=>other)");
  scanf("%d",&mp[mi].rofs);
     if(mp[mi].rofs!=0 && mp[mi].rofs!=1 &&mp[mi].rofs!=2 &&mp[mi].rofs!=3 &&mp[mi].rofs!=4){
	 status=false;puts("only digit can be accepted!you can only enter 0,1,2,3,4");
	 continue;
     }
     else
	status=true;
  printf("Enter the position of worker:");
  scanf("%s",mp[mi].position);
     if(strlen(mp[mi].position)==0 || strlen(mp[mi].position)>20){
	 status=false;puts("input error,position cannot over 20 character or less than 0 character!");
	 continue;
     }else
	status=true;
  printf("Enter the address of worker:\n");
  printf("\tProvince:");
  scanf("%s",mp[mi].addr.province);
     if(strlen(mp[mi].addr.province)==0 || strlen(mp[mi].addr.province)>20){
	 status=false;puts("input error,province cannot over 20 character or less than 0 character!");
	 continue;
     }
     else
       status=true;
printf("\tCity:");
scanf("%s",mp[mi].addr.city);
     if(strlen(mp[mi].addr.city)==0 || strlen(mp[mi].addr.city)>20){
	 status=false;puts("input error,city cannot over 20 character or less than 0 character!");
	 continue;
     }
     else
       status=true;
printf("\tStreet:");
scanf("%s",mp[mi].addr.street);
     if(strlen(mp[mi].addr.street)==0 || strlen(mp[mi].addr.street)>30){
	 status=false;puts("input error,street cannot over 30 character or less than 0 character!");
	 continue;
     }
     else
       status=true;
  printf("Enter the telephone number of worker:(area code/telephone code)");
  scanf("%s",mp[mi].tel);
     if(strlen(mp[mi].tel)==0 || strlen(mp[mi].tel)>13){
	status=false;puts("input error,telephone number cannot over 13 character or less than 0 character!");
	continue;
     }
    else
      status=true;
 }
}
fclose(fp);
 }
void main(void)
{
 struct WORKER profile[maxworker];data_load(&i,profile);
  do
  { if(k!=1)
    {printf("\nPlease press any key to return to the main meun");
    getch();}
    k++;  

    clrscr();
    initgraph(&GD,&GM,"e:\\tc\\bgi");
    setbkcolor(LIGHTBLUE);
    hz(200,20,40,2,10,"人事管理系統");
    printf("\n\n\n\n\n");
    printf("\t\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
    
    printf("\t\t\t*3.Search one worker from the file\n");
    printf("\t\t\t*4.Modify one worker's information\n");
   
    printf("\t\t\t*0.exit without save\n\n\n");
    printf("\t\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
    printf("\t\t\tPlease input your selection number:");

    scanf("%d",&selection);
    switch(selection)

	{
	  
	  case 3:
	  search(i,profile,1,"");
	  break;
	  case 4:
	  modify(i,profile);
	  break;
	 
	  case 0:
	    printf("Are you sure to exit without save?New data that you enter will be lost!(y/n)");
	    c=getch();
	    if(c=='y'||'Y')exit(0);
	    break;
	  default:

	    printf("please enter the correct selection!");
	    return 0;
	 }
 }while(1);

}