C++ Program of The Database or the Infomation System of the Students

Name: Student Information System

Created By: Mr. Jake Rodriguez Pomperada, MAED-Instructional Technology

Description: This program displays the database or the information system of the student you have added.

Below is the first  screenshot of this program when you RUN your codes. It displays the choices, numbered from 1 up to 5. Just select the number that you want... 

.

As you can see in the picture below, I entered number 2 to list or view the records that has been entered in the database.

 

  

//Below are the Codes of the Program:

#include <iostream.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#include <iomanip.h>


main() {
    FILE *fp, *ft;
    char another, choice;

struct student {
        char first_name[50], last_name[50];
        char course[100];
        int section;
    };

    struct student e;
    char xfirst_name[50], xlast_name[50];
    long int recsize;

    fp=fopen("users.txt","rb+");

    if (fp == NULL) {
        fp = fopen("users.txt","wb+");

        if (fp==NULL)
        {
             puts("Cannot open file");
             return 0;
        }
    }


 recsize = sizeof(e);

 while(1) {
     system("cls");

     cout << "\t\t====== STUDENT INFORMATION SYSTEM ======";
     cout <<"\n\n            Created By: Mr. Jake Rodriguez Pomperada, MAED-IT";
     cout << "\n\n";
     cout << "\n \t\t\t 1. Add    Records";
     cout << "\n \t\t\t 2. List   Records";
     cout << "\n \t\t\t 3. Modify Records";
     cout << "\n \t\t\t 4. Delete Records";
     cout << "\n \t\t\t 5. Exit   Program";
     cout << "\n\n";
     cout << "\t\t\t Select Your Choice :=> ";
     fflush(stdin);
     choice = getche();
     switch(choice)
     {
      case '1' :
            fseek(fp,0,SEEK_END);
            another ='Y';
            while(another == 'Y' || another == 'y')
            {
                  system("cls");
                cout << "Enter the Firt Name : ";
                cin >> e.first_name;
                cout << "Enter the Last Name : ";
                cin >> e.last_name;
                cout << "Enter the Course    : ";
                cin >> e.course;
                cout << "Enter the Section   : ";
                cin >> e.section;
                fwrite(&e,recsize,1,fp);
                cout << "\n Add Another Record (Y/N) ";
                fflush(stdin);
                another = getchar();
            }
            break;
   case '2':
            system("cls");
           rewind(fp);
           cout << "=== View the Records in the Database ===";
           cout << "\n";
           while (fread(&e,recsize,1,fp) == 1){
           cout << "\n";
           cout <<"\n" << e.first_name << setw(10)  << e.last_name;
           cout << "\n";
           cout <<"\n" <<e.course <<  setw(8)  << e.section;
           }
           cout << "\n\n";
           system("pause");
           break;

   case '3' :
            system("cls");
          another = 'Y';
          while (another == 'Y'|| another == 'y')
          {
              cout << "\n Enter the last name of the student : ";
              cin >> xlast_name;

            rewind(fp);
            while (fread(&e,recsize,1,fp) == 1)
            {
                if (strcmp(e.last_name,xlast_name) == 0)
                {
                cout << "Enter new the Firt Name : ";
                cin >> e.first_name;
                cout << "Enter new the Last Name : ";
                cin >> e.last_name;
                cout << "Enter new the Course    : ";
                cin >> e.course;
                cout << "Enter new the Section   : ";
                cin >> e.section;
                fseek(fp, - recsize, SEEK_CUR);
                fwrite(&e,recsize,1,fp);
                break;
                }
            }
            cout << "\n Modify Another Record (Y/N) ";
                fflush(stdin);
                another = getchar();
            }
            break;


     case '4':
       system("cls");
           another = 'Y';
          while (another == 'Y'|| another == 'y')
          {
              cout << "\n Enter the last name of the student to delete : ";
              cin >> xlast_name;

              ft = fopen("temp.dat", "wb");

              rewind(fp);
              while (fread (&e, recsize,1,fp) == 1)

                 if (strcmp(e.last_name,xlast_name) != 0)
                {
                    fwrite(&e,recsize,1,ft);
                }
                fclose(fp);
                fclose(ft);
                remove("users.txt");
                rename("temp.dat","users.txt");

                fp=fopen("users.txt","rb+");

                cout << "\n Delete Another Record (Y/N) ";
                fflush(stdin);
                another = getchar();
              }

              break;

              case '5':
              fclose(fp);
              cout << "\n\n";
              cout << "\t\t     THANK YOU FOR USING THIS SOFTWARE";
              cout << "\n\n";
              exit(0);
          }
     }


system("pause");
}