ProjectC

/** Sa se realizeze un program care actualizeaza evidenta unei
    grupe de studenti.Datele despre studenti -nume varsta ,medie
	se pastreaza sub forma unui fisier text. Programul trebuie
	sa permita urm.optiuni:
	 -adaugarea unui nou student in fisier
	 - listarea datelor tuturor studentilor
	 - modificarea datelor unui student
	 - terminarea programului
**/

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>
#define LNUME 20 /* Lungime maxim nume*/


char fisier[30]="db_user_struct.txt"; /**Numele fisierului **/
char db_file[30]="user_account.txt"; /**MEMBERS APLICATION**/

typedef struct{
	 char nume[LNUME];
	 int varsta;
	 float medie;
}student;

typedef struct{
    char user_name[LNUME];
    char pass[LNUME];
    char status[LNUME];
}login;

void LogIn(void){

    FILE *f;
	login adm;
	char name_member[LNUME],password[LNUME];
    int exist=0,connect=0;
	if(!(f=fopen(db_file,"r"))){
		puts("\nFisierul nu poate fi deschis.");
		return;
	}



  while(connect==0){

    system("cls");
    printf("Procedura de logare in cont initializata !\n");
	printf("--------------------------------------------");
	printf("\nUsername : ");
    fgets(name_member,LNUME,stdin);
    printf("Password : ");
    fgets(password,LNUME,stdin);

   name_member[strlen(name_member)-1]='\0';
   password[strlen(password)-1]='\0';

  while(fscanf(f,"%s %s %s",adm.user_name,adm.pass,adm.status)!=EOF)
  if(!strcmp(name_member,adm.user_name)){ /**Student gasit - se afiseaza datele**/
    exist=1;

    printf("Pass str :%s\nPass file :%s\nUser str:%s\nUser file:%s",password,adm.pass,name_member,adm.user_name);
    if(!strcmp(name_member,adm.user_name)&&!strcmp(password,adm.pass)){
      connect=1;
      break;
    }
    break;
  }

  if(!exist){
    printf("\nMembrul : %s nu exista !\n",name_member);
    system("pause");
  }else{
    if(connect)
    {
       printf("Conectare cu succes!\n");

    }else{
      printf("Parola este incorecta !\n");
      system("pause");

        }
      }

    }

  fclose(f);
}


void AddStudent(void){
	FILE *f;
	student s;
	if(!(f=fopen(fisier,"a"))){
		puts("\nFisierul nu poate fi deschis.");
		return;
	}
	printf("\nNume,varsta,media:");
	scanf("%s %d %f",s.nume,&s.varsta,&s.medie);
	fflush(stdin); /*Se goleste buffer-ul tastaturii*/
	fprintf(f,"%20s %2d %6.2f\n",s.nume,s.varsta,s.medie);
	fclose(f);
}
void ListStudenti(void){
	FILE *f;
	student s;
	if(!(f=fopen(fisier,"r"))){
		puts("\nFisierul nu poate fi deschis.");
		return;
	}
	while(fscanf(f,"%s %d %f",s.nume,&s.varsta,&s.medie)!=EOF)
       printf("\n%-20s %2d %6.2f\n",s.nume,s.varsta,s.medie);
     fclose(f);
}

void ModifStudent(void){
 int gasit=0;
 FILE *f;
 student s;
 char n[LNUME];/*Numele stud. ale carui date se modifica*/
 if(!(f=fopen(fisier,"r+"))){
		puts("\nFisierul nu poate fi deschis.");
		return;
	}
  printf("\nNume student: ");
  fgets(n,LNUME,stdin);
  n[strlen(n)-1]='\0';
  while(fscanf(f,"%s %d %f",s.nume,&s.varsta,&s.medie)!=EOF)
  if(!strcmp(n,s.nume)){ /**Student gasit - se afiseaza datele**/
    printf("\n%-20s %2d %6.2f",s.nume,s.varsta,s.medie);
    gasit=1;
    break;
  }
  if(!gasit)
    printf("\nStudentul %s nu exista in fisier.",n);
  else{
    printf("\nNumele ,varsta ,media:");
    scanf("%s %d %f",s.nume,&s.varsta,&s.medie);
    fflush(stdin);
    /**POZITIONARE LA INCEPUTUL INREGISTRARI**/
    fseek(f,-32,SEEK_CUR);
    fprintf(f,"%20s %2d %6.2f",s.nume,s.varsta,s.medie);
  }
  fclose(f);
}


void ShowMeniu(void){
     system("color 0a");
     printf("#--------------------------------#");
     puts("\na,A -----Adaugare Student.");
     puts("\nm,M -----Modifica date Student.");
     puts("\nl,L -----Listare Studenti.");
     puts("\nx,X -----Iesire din program.");
     printf("#--------------------------------#\nSelecteaza o optiune ! :");
}

void main(void){
    LogIn();

 char opt;
// puts("Nume fisier :");
 //fgets(fisier,30,stdin);
 while(1){
    ShowMeniu();
    opt=tolower(getche());
    switch(opt){
      case 'a':AddStudent();break;
      case 'm':ModifStudent();break;
      case 'l':ListStudenti();break;
      case 'x':exit(0);
      default:puts("\nComanda Invalida\n");
    }
  }
}