student_database_management.txt

 #include"stdio.h"
 #include<stdlib.h>

void addstudent();
void studentrecord();
void searchstudent();
void delete();

  struct student {
    char first_name[20];
    char last_name[20];
    int roll_no;
    char course[10];
     char home[20];
    int per;
};

void main()
{

    int choice;
    while(choice!=5){

    printf("\t\t\t=====STUDENT DATABASE MANAGEMENT SYSTEM=====");
    printf("\n\n\n\t\t\t\t     1. Add Student\n");
    printf("\t\t\t\t     2. Student Records\n");
    printf("\t\t\t\t     3. Search Student\n");
    printf("\t\t\t\t     4. Delete Record\n");
    printf("\t\t\t\t     5. Exit\n");
    printf("\t\t\t\t    _____________________\n");
    printf("\t\t\t\t     ");
    scanf("%d",&choice);

   switch(choice){
       case 1:
          addstudent();
         break;
     case 2:
          studentrecord();
          printf("\t\t\t\t  Press any key to exit.\n");
          getch();
         break;

     case 3:
         searchstudent();
         printf("\n\t\t\t\t  Press any key to exit.\n");
          getch();
         break;

     case 4:
        delete();
        printf("\n\t\t\t\tPress any key to exit.\n");
        getch();
        break;
     case 5:
          printf("\n\t\t\t\tThank-you.\n\n");
          exit(0);
        break;

     default :
         getch();
         printf("\n\t\t\t\t\tEnter a valid number\n\n");
         printf("\t\t\t\tPress any key to continue.");
         getch();
         break;
        }

        }

        getch();
     }

 void addstudent(){

     char another;
     FILE *fp;
     int n,i;
     struct student info;
   do{
       printf("\t\t\t\t=======Add Students Info=======\n\n\n");
       fp=fopen("information.txt","a");

        printf("\n\t\t\tEnter First Name: ");
          scanf("%s",&info.first_name);
          printf("\n\t\t\tEnter Last Name: ");
          scanf("%s",&info.last_name);
          printf("\n\t\t\tEnter Registration number: ");
          scanf("%d",&info.roll_no);
          printf("\n\t\t\tEnter Course: ");
          scanf("%s",&info.course);
          printf("\n\t\t\tEnter Hometown: ");
          scanf("%s",&info.home);
          printf("\n\t\t\tEnter Semester: ");
          scanf("%d",&info.per);
          printf("\n\t\t\t______________________________\n");

      if(fp==NULL){
        fprintf(stderr,"can't open file");
    }else{
        printf("\t\t\tRecord stored successfully.\n");
    }

    fwrite(&info, sizeof(struct student), 1, fp);
    fclose(fp);

    printf("\t\t\tAdd another record?(y/n) : ");


    scanf("%s",&another);


   }while(another=='y'||another=='Y');
}

 void studentrecord(){

     FILE *fp;

    struct student info;
    fp=fopen("information.txt","r");

     printf("\t\t\t\t=======STUDENT RECORDS=======\n\n\n");

    if(fp==NULL){

        fprintf(stderr,"can't open file\n");
        exit(0);
    }else{
        printf("\t\t\t\tRECORDS :\n");
        printf("\t\t\t\t___________\n\n");
    }

        while(fread(&info,sizeof(struct student),1,fp)){
        printf("\n\t\t\t\t Student Name       : %s %s",info.first_name,info.last_name);
        printf("\n\t\t\t\t Registration number: %d",info.roll_no);
        printf("\n\t\t\t\t Course             : %s",info.course);
        printf("\n\t\t\t\t Hometown           : %s",info.home);
        printf("\n\t\t\t\t Semester           : %d%",info.per);
        printf("\n\t\t\t\t ________________________________\n");

         }
        fclose(fp);
        getch();

  }

void searchstudent(){
       struct student info;
      FILE *fp;
      int roll_no,found=0;

    fp=fopen("information.txt","r");
    printf("\t\t\t\t=======SEARCH STUDENTS RECORD=======\n\n\n");
    printf("\t\t\tEnter the registration number: ");

    scanf("%d",&roll_no);



    while(fread(&info,sizeof(struct student),1,fp)>0){

        if(info.roll_no==roll_no){

        found=1;
        printf("\n\n\t\t\tStudent Name     : %s %s",info.first_name,info.last_name);
        printf("\n\t\t\tRegistration number: %d",info.roll_no);
        printf("\n\t\t\tCourse             : %s",info.course);
        printf("\n\t\t\tHometown           : %s",info.home);
        printf("\n\t\t\tSemester           : %d%",info.per);
        printf("\n\t\t\t______________________________________\n");

         }

    }

    if(!found){
       printf("\n\t\t\tRecord not found.\n");
    }

    fclose(fp);
    getch();

}


 void delete(){
      struct student info;
      FILE *fp, *fp1;


    int roll_no,found=0;

       printf("\t\t\t\t=======DELETE STUDENT RECORD=======\n\n\n");
    fp=fopen("information.txt","r");
    fp1=fopen("temp.txt","w");
    printf("\t\t\t\tEnter the registration number: ");
    scanf("%d",&roll_no);
    if(fp==NULL){
         fprintf(stderr,"can't open file\n");
         exit(0);
      }

    while(fread(&info,sizeof(struct student),1,fp)){
        if(info.roll_no == roll_no){

            found=1;

        }else{
           fwrite(&info,sizeof(struct student),1,fp1);
        }

    }
     fclose(fp);
     fclose(fp1);

    if(!found){
          printf("\n\t\t\t\tRecord not found.\n");
        }
      if(found){
    remove("information.txt");
        rename("temp.txt","information.txt");

        printf("\n\t\t\t\tRecord deleted successfully.\n");
        }

  getch();
  }