/*Student Record System to insert student and parents information,record and remark,search,display,
 delete and update student's and parent's record with remark*/

#include <stdio.h>
#include <stdlib.h>
/*structure to read date*/
struct date
{
    int dd;
    //*day
    int mm;
    //*month
    int yy;
    //*year
};
/*structure to read address*/
struct address
    {

        char country[15];
        char city[15];
        char street_address[20];
        char temp_address[20];
        char perm_address[20];
    };
/*structure to read student information */
struct student
{
    int roll;
    char f_name[30];
    char l_name[30];
    char program[30];
    char level[30];
    struct address a;
    struct date d_o_b;
    char contact[11];
    char e_mail[20];
    char gender;
}db_student;
/*structure to read parents information */
struct parents
{
    char f_name[30];
    char l_name[30];
    char relation[30];
    struct address a;
    char contact[10];
    char e_mail[20];
}db_parents;
//function to add student record to
//add student information to the file
//"student_info_file.dat
void student_info_write();
//function prototype for student information
void parents_info_write();
//function prototype for parents information
void print_student_info();
//function prototype to print student information
int student_available(int);

void student_info_write()
{
    FILE *fp;
    fp=fopen("student_info_file.dat","a");
    /*pointer=fopen("file_name","open mode");
    a=append,add
    */
    fflush(stdin);
    printf("\n enter first name:");
    gets(db_student.f_name);
    printf("\n enter last name:");
    gets(db_student.l_name);
    printf("\n enter program:");
    gets(db_student.program);
    printf("\n enter level:");
    gets(db_student.level);
    printf("\n enter country:");
    gets(db_student.a.country);
    printf("\n enter city:");
    gets(db_student.a.city);
    printf("\n enter street_address:");
    gets(db_student.a.street_address);
    printf("\n enter temp_address:");
    gets(db_student.a.temp_address);
    printf("\n enter perm_address:");
    gets(db_student.a.perm_address);
    printf("\n enter d.o.b:");
    printf("\n enter year:");
    scanf("%d",&db_student.d_o_b.yy);
    printf("\n month:");
    scanf("%d",&db_student.d_o_b.mm);
    printf("\n day:");
    scanf("%d",db_student.d_o_b.dd);
    printf("\n enter contact:");
    sacnf("%d",&db_student.contact);
    printf("\n enter e_mail:");
    gets(db_student.e_mail);
    printf("\n gender?(M/F)");
    gets(db_student.gender);
    fwrite(&db_student,sizeof(db_student),1,fp);
    fclose(fp);
}

//function to write parents information
void parents_info_write()
{
    FILE *fp;
    fp=fopen("parents_info_file.dat","a");
    fflush(stdin);
    printf("\n enter first name:");
    gets(db_parents.f_name);
    fflush(stdin);
    printf("\n enter last name:");
    gets(db_parents.l_name);
    fflush(stdin);
    printf("\n enter relation:");
    gets(db_parents.relation);
    fflush(stdin);
    printf("\n enter country:");
    gets(db_parents.a.country);
    fflush(stdin);
    printf("\n enter city:");
    gets(db_parents.a.city);
    fflush(stdin);
    printf("\n enter street_address:");
    gets(db_parents.a.street_address);
    fflush(stdin);
    printf("\n enter temp_address:");
    gets(db_parents.a.temp_address);
    fflush(stdin);
    printf("\n enter perm_address:");
    gets(db_parents.a.perm_address);
    fflush(stdin);
    printf("\n enter contact:");
    gets(db_parents.contact);
    fflush(stdin);
    printf("\n enter e_mail:");
    gets(db_parents.e_mail);

    fwrite(&db_parents,sizeof(db_parents),1,fp);
    fclose(fp);
}
/*

function read and print student info
from the file "student_info_file.dat"
and display the information

*/
void print_student_info()
//print according to roll no
{
    FILE *fp;
    int r,i;
    printf("\n Enter roll number to search:");
    scanf("%d",&r);
    i=student_available(r);
    if(i==0)
    {
    fp=fopen("student_info_file.dat","r");
    while(!feof(fp))
    {
        if(db_student.roll==r);
        {
        printf("\n first name:");
        printf("\n%s",db_student.f_name);
        printf("\n last name:");
        printf("\n program:");
        printf("\n%s",db_student.program);
        printf("\n level:");
        printf("\n%s",db_student.level);
        printf("\n country:");
        printf("\n%s",db_student.a.country);
        printf("\n city:");
        printf("\n%s",db_student.a.city);
        printf("\n street_address:");
        printf("\n%s",db_student.a.street_address);
        printf("\n temp_adreess:");
        printf("\n%s",db_student.a.temp_address);
        printf("\n perm_address:");
        printf("\n%s",db_student.a.perm_address);
        printf("\n date of birth");
        printf("\n year");
        printf("%d",db_student.d_o_b.yy);
        printf("\n month");
        printf("%d",db_student.d_o_b.mm);
        printf("\n day");
        printf("%d",db_student.d_o_b.dd);
        printf("\n contact:");
        printf("%d",db_student.contact);
        printf("\n e_mail");
        printf("%d",db_student.e_mail);
        }
        }
    }
}
//checking for roll no.
int student_available(int r)
{
    FILE *fp;
    fp=fopen("student_info_file.dat","r");
    while(!feof(fp))
    {
        fread(&db_student,sizeof(db_student),1,fp);
            if(r==db_student.roll)
            {
                fclose(fp);
                return 0;
            }
    }
fclose(fp);
return 1;
}
//function to view parents information
void view_parents_info(char c[])
{
FILE *fp;
fp=fopen("student_info_file.dat","r");
int confirm;
while(!feof(fp))
{
    fread(&db_student,sizeof(db_student),1,fp);
    if(strcmp(c,db_parents.f_name)==0)
    {
    printf("\n first name:");
    printf("\n%s",db_parents.f_name);
    printf("\n last name:");
    printf("\n%s",db_parents.l_name);
    printf("\n country:");
    printf("\n%s",db_parents.a.country);
    printf("\n city:");
    printf("\n%s",db_parents.a.city);
    printf("\n street_address:");
    printf("\n%s",db_parents.a.street_address);
    printf("\n temp_adreess:");
    printf("\n%s",db_parents.a.temp_address);
    printf("\n perm_address:");
    printf("\n%s",db_parents.a.perm_address);
    printf("\n contact:");
    printf("%s",db_parents.contact);
    printf("\n e_mail");
    printf("%s",db_parents.e_mail);
    fclose(fp);
    break;
    }
}
//function to search the given record
void search()
{
  FILE *fp;
  int r,s,available;
  printf("enter the roll number to search:");
  scanf("%d",&r);
  available=isRollAvailabe(r);
  if(available==0)
      printf("No record found for roll %d.",r);
  else
  {
      fp=fopen("Record","rb");
      while(fread(&db_student,sizeof(db_student),1,fp))
      {
          s=db_student.roll;
          if(s==r)
          {
              printf("\n Roll: %d",db_student.roll);
              printf("\n first name:%s",db_student.f_name);
              printf("\n last name:%s",db_student.l_name);
              printf("\n program:%s",db_student.program);
              printf("\n level:%s",db_student.level);
              printf("\n country:%s",db_student.a.country);
              printf("\n city:%s",db_student.a.city);
              printf("\n street_address:%s",db_student.a.street_address);
              printf("\n temp_address:%s",db_student.a.temp_address);
              printf("\n perm_address:%s",db_student.a.perm_address);
              printf("\n date of birth");
              printf("\n year");
              printf("\n year:%d",db_student.d_o_b.yy);
              printf("\n month:%d",db_student.d_o_b.mm);
              printf("\n day:%d",db_student.d_o_b.dd);
              printf("\n contact:%d",db_student.contact);
              printf("\n e_mail:%d",db_student.e_mail);
          }
      }
      fclose(fp);
   }
 }
//function to delete record
void deleteRecord()
{
 FILE *fp, *fp2;
 int r,s, available;
 printf("Enter the roll number to delete record: ");
 scanf("%d", &r);
 available =isRollavailable(r);
 if(available==0)
    printf("no record to delete for roll %d.",r);
 else
 {
  fp=fopen("Record","rb");
  fp2=fopen("Tempfile","wb");
  while(fread(&db_student,sizeof(db_student),1,fp))
  {
      s=db_student.roll;
      if(s !=r)
        fwrite(&db_student,sizeof(db_student),1,fp2);
  }
  fclose(fp);
  fclose(fp2);
  fp=fopen("Record","wb");
  fp2=fopen("Tempfile","rb");
   while(fread(&db_student,sizeof(db_student),1,fp2))
   {
      fwrite(&db_student,sizeof(db_student),1,fp);
   }
   printf("\n Record Deleted");
   fclose(fp);
   fclose(fp2);
 }
}
//function to update record
void update()
{
    FILE *fp1, *fp2;
    int r, s, available;
    printf("enter the roll number to update record:");
    scanf("%d", &r);
    available=isRollAvailable(r);
    if(available==0)
        printf("no record to delete for roll %d.",r);
 else
 {
  fp=fopen("Record","rb");
  fp2=fopen("Tempfile","wb");
  while(fread(&db_student,sizeof(db_student),1,fp))
  {
      s=db_student.roll;
      if(s !=r)
        fwrite(&db_student,sizeof(db_student),1,fp2);
        else
        {
            printf("\n Updating data for previous roll %d",r);
            printf("\n enter new roll:");
            scanf("%d",&db_student.roll);
            fflush(stdin);
            printf("\n enter new name:");
            scanf("%d",&db_student.f_name);
            fflush(stdin);
            printf("\n enter new first name:");
            gets(db_student.f_name);
            fflush(stdin);
            printf("\n enter new last name:");
            gets(db_student.l_name);
            fflush(stdin);
            printf("\n enter new program:");
            gets(db_student.program);
            fflush(stdin);
            printf("\n enter new  level:");
            gets(db_student.level);
            fflush(stdin);
            printf("\n enter new  country:");
            gets(db_student.a.country);
            fflush(stdin);
            printf("\n enter new city:");
            gets(db_student.a.city);
            fflush(stdin);
            printf("\n enter new  street_address:");
            gets(db_student.a.street_address);
            fflush(stdin);
            printf("\n enter new temp_address:");
            gets(db_student.a.temp_address);
            fflush(stdin);
            printf("\n enter  new perm_address:");
            gets(db_student.a.perm_address);
            fflush(stdin);
            printf("\n enter new d.o.b:");
            printf("\n enter new year:");
            scanf("%d",&db_student.d_o_b.yy);
            printf("\n enter new month:");
            scanf("%d",&db_student.d_o_b.mm);
            printf("\n enter new day:");
            scanf("%d",db_student.d_o_b.dd);
            printf("\n enter new  contact:");
            scanf("%d",&db_student.contact);
            fflush(stdin);
            printf("\n enter new e_mail:");
            gets(db_student.e_mail);
            fflush(stdin);
            printf("\n new gender?(M/F)");
            gets(db_student.gender);
            fwrite(&db_student,sizeof(db_student),1,fp);
        }
    fclose(fp);
    fclose(fp2);
    fp=fopen("Record","rb");
    fp2=fopen("Tempfile","wb");
    while(fread(&db_student,sizeof(db_student),1,fp2))
    {
        fwrite(&db_student,sizeof(db_student),1,fp);
    }
    printf("\n Record Updated");
    fclose(fp);
    fclose(fp2);
    }
  }
}


int main()
{
  int ch;
  //FILE *fp;
  //fp=fopen("record","w");
  while(1)
  {
    printf("\n----------------------------------------------------------\n");
    printf("\n User Menu:");
    printf("\n \t1.Add Student Information\n \t2.Add Parents Information\n \t3.View Student Information\n \t4.View Parents Information\n\n");
    printf("enter your choice:");
    scanf("%d",&ch);
    switch(ch)
    {
    case 1:
        student_info_write();
    case 2:
        parents_info_write();
    case 3:
        print_student_info();
    case 4:
        print_parents_info();



    }
  {

  }
    return 0;
}
int main