#include <stdio.h>
#include <conio.h>
#include "valid.c"struct emp_detail
{  int emp_no;
   char emp_name[10];
   int emp_age;
};

 void getWriteFileName(char *str);
 void getReadFileName(char *str);
 void enterData();
 void getTotalCount();
 void getName(char *);

 FILE *fp;
 int flag=1;
 int count=0;
 char filename[14];
 struct emp_detail emp_cur;

 void main()
 {
    char option;
    clrscr();
    printf("\nDo you want to create the data file type 'y' for yes and 'n' for no.");
    scanf("%c", &option);
    fflush(NULL);

      if( option == 'y' || option == 'Y')
       getWriteFileName(filename);
      elseif( option == 'n' || option == 'N')
       {   getReadFileName(filename);
       getTotalCount();
       }

    getch();
 }

 void enterData()
 {
    printf("\nEnter data .....");
    while(flag)
    {
    //printf("\nEnter employee no. : ");//scanf("%d", &emp_cur.emp_no);
    getPosInteger("Enter employee no. : ", &emp_cur.emp_no);
    fflush(NULL);

    printf("\nEnter employee name : ");
       //scanf("%[^\n]", emp_cur.emp_name);
    getName(emp_cur.emp_name);
    fflush(NULL);

    //printf("\nEnter employee age : ");//scanf("%d", &emp_cur.emp_age);
    getPosInteger("Enter employee age : ", &emp_cur.emp_age);
    fflush(NULL);

    fprintf(fp,"%d %-10s %d", emp_cur.emp_no, emp_cur.emp_name, emp_cur.emp_age);

    if( flag > 0 )
       fprintf(fp,"\n");

    flag++;

    if(emp_cur.emp_no != 9999)
    {   printf("\nEnter 1 to continue and 0 to exit.");
        scanf("%d", &flag);
        fflush(NULL);
    }
    else flag=0;
    count++;
    }

    fclose(fp);
    printf("\nTotal number of employee record entered is : %d", count);
 }

    void getName(char *str)
    {
    int count=0;
    char *getstr;
    char readch='\0';
    int errorflag = 0;

       fflush(NULL);
       getstr = str;

       while(1)
       {
        scanf("%c", &readch);
        if( readch == '\n')
           break;
        if( isalpha(readch) == 0)
        {   printf("\nInvalid entry. Enter characters only.\nEnter name again :");
            errorflag = 1;
            break;
        }
        else
            *getstr = readch;

        count++;
        getstr++;
        if( count >= 10 )
          break;
       }

       if(errorflag)
          getName(emp_cur.emp_name);

      // *getstr='\0';
    }

   void getWriteFileName(char *str)
   {
     printf("Enter Output File name maxium 14 character : ");
     scanf("%s", str);

     if( ( fp = fopen(str, "wt") ) == NULL  )
     {  fclose(fp);
    printf("\nInvalid file name entered.");
     }
     else
    enterData();
  }

   void getReadFileName(char *str)
   {
     printf("Enter Input File name maxium 14 character : ");
     scanf("%s", str);

     if( ( fp = fopen(str, "r+t") ) == NULL  )
     {  fclose(fp);
    printf("\nInvalid file name entered.");
     }
   }

    void getTotalCount()
    {  flag =0;
       while( feof(fp) == 0 )
       {
      fscanf(fp, "%d %10s %4d", &emp_cur.emp_name, emp_cur.emp_name, &emp_cur.emp_age);
      flag++;
       }
      fclose(fp);
      printf("\nTotal number of employee record entered is : %d", flag);

    }

    /**************************** Input/Output ********************************/



    Do you want to create the data file type 'y'for yes and 'n'for no.y
    Enter Output File name maxium 14 character : output.txt

    Enter data .....
    Enter employee no. : 1

    Enter employee name : chintan

    Enter employee age : 26

    Enter 1 to continue and 0 to exit.1

    Enter employee no. : 9999

    Enter employee name : nilay

    Enter employee age : 29

    Total number of employee record entered is : 2

    /*******************************  **********************************/