#include <stdio.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>
#include "valid.c"struct student_detail
{
   int rollno;
   char name[10];
   int pass_year;
   char department[10];
   char address[20];
   char employer[20];
   char place[20];
};


 void getWriteFileName(char *);
 void getReadFileName(char *);
 void enterData();
 void searchFor();
 void startSearch();
 void getName(char *);
 void getAddress(char *);
 int charToNumber(char chr);
 int compare(char *source, char *csource);

 struct student_detail st_cur, st_search;
 int flag=1, option=0;
 char filename [14];
 char data[94];
 char num[4];


 FILE *fp;

  void main()
  {
    clrscr();
    printf("\nSelect any of the option from below.");
    printf("\n1. Add New Records");
    printf("\n2. Find student detail\n");

    scanf("%d", &option);
    fflush(NULL);

      if( option == 1)
     getWriteFileName(filename);
      elseif( option == 2)
      {
     getReadFileName(filename);
     searchFor();
     startSearch();
      }

    getch();
  }

 void enterData()
 {
    printf("\nEnter data ..... Use value 9999 for roll no to terminate data entry.");
    while(flag)
    {
    getPosInteger("Enter Record No. : ", &st_cur.rollno);
    fflush(NULL);

    printf("\nEnter Student Name : ");
    getName(st_cur.name);
    fflush(NULL);

    getPosInteger("Enter Passing out Year : ", &st_cur.pass_year);
    fflush(NULL);

    printf("\nEnter Department Name : ");
    getName(st_cur.department);
    fflush(NULL);

    printf("\nEnter Student Address : ");
    getAddress(st_cur.address);
    fflush(NULL);

    printf("\nEnter Employer's Name : ");
    getAddress(st_cur.employer);
    fflush(NULL);

    printf("\nEnter Employment Place : ");
    getAddress(st_cur.place);
    fflush(NULL);

    fprintf(fp,"%-4d %-10s %-4d %-10s %-20s %-20s %-20s", st_cur.rollno, st_cur.name, st_cur.pass_year, st_cur.department, st_cur.address, st_cur.employer, st_cur.place);

    flag++;

      if(st_cur.rollno == 9999)
    flag = 0;
      else
     fprintf(fp,"\n");
    }

    fclose(fp);
 }

 void searchFor()
 {
    printf("\nEnter search parameter.");

    getPosInteger("Enter Passing out Year : ", &st_search.pass_year);
    fflush(NULL);

    printf("\nEnter Department Name : ");
    getName(st_search.department);
    fflush(NULL);

    printf("\nEnter Employment Place : ");
    getAddress(st_search.place);
    fflush(NULL);

 }
    void getName(char *str)
    {
    int count1=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 = tolower(readch);

        count1++;
        getstr++;
        if( count1 >= 10 )
          break;
       }
       fflush(NULL);

       if(errorflag)
          getName(str);

       *getstr='\0';
    }

    void getAddress(char *str)
    {
    int count1=0;
    char *getstr;
    char readch='\0';

       fflush(NULL);
       getstr = str;

       while(1)
       {
        scanf("%c", &readch);

        if( readch == '\n')
           break;
        else
            *getstr = tolower(readch);

        count1++;
        getstr++;
        if( count1 >= 20 )
          break;
       }
       fflush(NULL);

       *getstr='\0';
    }

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

     if( ( fp = fopen(fname, "a+t") ) == NULL  )
     {  fclose(fp);
    printf("\nInvalid file name entered.");
     }
     else
    enterData();
  }

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

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

   void startSearch()
   {
      int count1=0, count2=0, count3=0;

      while ( feof(fp) == 0)
      {
    // fscanf(fp, "%-4d %-10s %-4d %-10s %-20s %-20s %-20s", &st_cur.rollno, st_cur.name, &st_cur.pass_year, st_cur.department, st_cur.address, st_cur.employer, st_cur.place);//printf("%-4d %-10s %-4d %-10s %-20s %-20s %-20s", st_cur.rollno, st_cur.name, st_cur.pass_year, st_cur.department, st_cur.address, st_cur.employer, st_cur.place);
      st_cur.pass_year=0;
      for(count1=0; count1<94; count1++)
      {
          data[count1] = getc(fp);
         if( data[count1] == '\n')
           break;

          if( count1 >=16 && count1 <= 19)
          {
         if( isdigit(data[count1]) )
           if( st_cur.pass_year == 0)
             st_cur.pass_year = charToNumber(data[count1]);
           else
           {
              st_cur.pass_year *= 10;
              st_cur.pass_year += charToNumber(data[count1]);
           }
          }

          elseif( count1 >=21 && count1 <= 30)
          {    if( isalpha(data[count1]) )
           {
             st_cur.department[count2] = data[count1];
             count2++;
           }
          }
          elseif( count1 >=74 && count1 <= 93)
          {
          st_cur.place[count3] = data[count1];
          count3++;
          }
          //else count2=0;
      }

        data[count1] ='\0';
        st_cur.department[count2] = '\0';
        st_cur.place[count3] = '\0';
        count2=0;
        count3=0;

        if( (st_cur.pass_year == st_search.pass_year) && compare(st_cur.department, st_search.department) && compare(st_cur.place, st_search.place) )
        printf("\n%s",data);
      }
       fclose(fp);
   }

   int charToNumber(char chr)
   {
       int val=0;
       switch(chr)
       {
      case'0': val = 0;
            break;
      case'1': val = 1;
            break;
      case'2': val = 2;
            break;
      case'3': val = 3;
            break;
      case'4': val = 4;
            break;
      case'5': val = 5;
            break;
      case'6': val = 6;
            break;
      case'7': val = 7;
            break;
      case'8': val = 8;
            break;
      case'9': val = 9;
            break;
       }
       return val;
   }

    int compare(char *source, char *csource)
    {
       int cflag = 0;
       char *tsource = source;
       char *str = csource;
        while(1)
        {
          if( *tsource == *str)
        cflag = 1;
          else {
             cflag = 0;
             break;
           }
           tsource++;
           str++;
           if(  *tsource == '\0' || *str=='\0' )
          break;
        }
        return cflag;
    }

    /*********************************  Input ***********************


    Select any of the option from below.
    1. Add New Records
    2. Find student detail
    1
    Enter Output File name maxium 14 character : output.txt

    Enter data ..... Use value 9999 for roll no to terminate data entry.
    Enter Record No. : 1

    Enter Student Name : chintan

    Enter Passing out Year : 1999

    Enter Department Name : development

    Enter Employer's Name : TCS

    Enter Employment Place : pune

    Enter Student Address : sabarmat


    Select any of the option from below.
    1. Add New Records
    2. Find student detail
    2
    Enter Input File name maxium 14 character : output.txt

    Enter search parameter.
    Enter Passing out Year : 1999

    Enter Department Name : development

    Enter Employment Place : pune

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