project

#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<stdlib.h>   //for using styme("CLS")
#define ENTER 13
#define BKSP 8
//subfunction diclaration
void login();
void menu();
struct data
{
    int phone,batch;
    char name [100];
    char email[100];
    char blood_group[10];

} entry;

//char query[20],name[20];
// FILE *fp,*ft;
// int i,n,l,found;
int main()
{

    login();       // call login function
    return 0;
}
void login()
{
    int i;
    char password[100],ch;
    char username[100];
    printf("\n\n\t\t*************************************************\n\t\t*\t\t\t\t\t\t*\n\t\t*\tENTER YOUR USERNAME AND PASSWORD\t*\n\t\t*\t\t\t\t\t\t*\n\t\t*************************************************\n");
    printf("\n\t\t\tUSERNAME:");
    scanf("%s",&username);
    printf("\n\t\t\tPASSWORD:");

    for(i=0; i<100; i++)      //loop for password input

    {
        ch = getch();       //getch don't showing input from user
        if(ch==ENTER)
        {
            break;
        }

        else
        {
            password[i] = ch;
            ch = '*' ;
            printf("%c",ch);
        }

    }

    password[i] = '\0';       //in string last character is a null character
    if(strcmp(username,"abc")==0)   // strcmp for compearision
    {


        if(strcmp(password,"123")==0)
        {
            getch();                   // getch is used to hold the window
            system("CLS");
            printf("\n\n\t\tSUCCESSFULLY LOG IN......");
            printf("\n\n\t\tPress Any Key To Countinue..... ");
            getch();
            system("CLS");
            menu();   // call menu function
        }
        else
        {
            printf("\n\n\t\tPlease Enter Correct Password.....");
            printf("\n\n\t\tPress Any Key To Countinue..... ");
            getch();
            system("CLS"); //system("CLS") using for clear screen
            login();    // call login function
        }


    }
    else
    {
        printf("\n\n\t\tPlease Enter Correct Username.....");
        printf("\n\n\t\tPress Any Key To Countinue..... ");
        getch();
        system("CLS");
        login();  // call login function
    }




}

void menu()
{
    int choise,quite;
    FILE *fp,*ft;
    int i,n,l,found;
    printf("\n\n\t\t   ======WELCOME TO BLOOD GROUP MANAGEMENT======\n");
    printf("\n\n\t\t\t*********************************\n\t\t\t*\t\t\t\t*\n\t\t\t*\t     Main Menu      \t*\n\t\t\t*\t\t\t\t*\n\t\t\t*********************************\n\t\t\t*\t\t\t\t*");
    printf("\n\t\t\t*\t  [1]Data Entry\t\t*\n");
    printf("\t\t\t*\t  [2]All List\t\t*\n");
    printf("\t\t\t*\t  [3]Search\t\t*\n");
    printf("\t\t\t*\t  [4]Delete\t\t*\n");
    printf("\t\t\t*\t  [5]About Us\t\t*\n");
    printf("\t\t\t*\t  [6]Exit\t\t*\n\t\t\t*\t\t\t\t*\n");
    printf("\t\t\t*********************************\n\n");
    printf("\t\t\t\tChoise Any Number: ");

    scanf("%d",&choise);

    switch(choise)
    {

    case 6:
        system("CLS");
        printf("\n\n\n\t\t\t*********************************\n\t\t\t*\t   Are you sure?\t*\n\t\t\t*********************************\n\t\t\t*\t[1]YES   *\t[2]NO   *\n\t\t\t*********************************");
        printf("\n\n\t\t\tChoise Any Number: ");
        scanf("%d",&quite);
        if(quite==1)
        {
            system("CLS");
            printf("\n\n\n\n\n\n\t\t\t*********Thanks For Using*********\n\n\n\n\n\n\n\n\n\n\n");
            break;
        }
        else if(quite==2)
        {

            system("CLS");
            menu();       // call menu function
        }
        else
        {
            printf("\n\n\t\t\tInvalid....\n\n ");
            getch();
            system("CLS");
            menu();                     //if invalid go to menu


        }
        break;
    case 1:
        system("CLS");
        fp=fopen("bloodgroup.txt","a");                //open a text file name bloodgroup.txt
        printf("\n\n\t\t\t ENTRY YOUR USEFUL DATA\n\t===========================================================");

        while(1)
        {
            fflush(stdin);                               //fflush(stdin) using for clear buffer memory
            printf("\n\t\t(to exit enter a blank space in name option)");
            printf("\n\n\t\t\tName:");
            gets(entry.name);
            if( strcmp(entry.name," ")==0)
            {
                break;
            }
            fflush(stdin);
            printf("\t\t\tBlood Group:");
            gets(entry.blood_group);
            fflush(stdin);
            printf("\t\t\tBatch:");
            scanf("%d",&entry.batch);
            fflush(stdin);
            printf("\t\t\tPhone:");
            scanf("[%d",&entry.phone);
            fflush(stdin);
            printf("\t\t\tEmail:");
            gets(entry.email);
            fflush(stdin);
            fwrite(&entry,sizeof(entry),1,fp);             //fwrite for written all entry in file
            system("CLS");
            printf("\n\n\t\t\t ENTRY YOUR USEFUL DATA\n\t===========================================================");
        }
        printf("\n\n\n\t\t\t(Press [1]exit or [2]menu)");
         printf("\n\n\t\t\tChoise Any Number: ");
        scanf("%d",&quite);
        if(quite==1)
        {
            system("CLS");
            printf("\n\n\n\n\n\n\t\t\t*********Thanks For Using*********\n\n\n\n\n\n\n\n\n\n\n");
            break;
        }
        else if(quite==2)
        {

            system("CLS");
            menu();       // call menu function
        }
        else
        {
            printf("\n\n\t\t\tPlease Enter Valid Option....\n\n ");
            getch();
            system("CLS");
            menu();

        fclose(fp);                                         //closing file
        break;
    case 5:
        system("CLS");
         printf("\n\n\t\tINFORMATION ABOUT GROUP 404 NOT FOUND\n\t===========================================================");
         printf("\n\t\tName:Md.Mahedi Hasan\n\t\tID:181-15-10900\n\t\tSECTION:D\n");
         printf("\n\t\tName:Sajib Ahmed\n\t\tID:181-15-10874\n\t\tSECTION:D\n");
         printf("\n\t\tName:Mohd.Mehedi Hasan Joy\n\t\tID:181-15-10628\n\t\tSECTION:D\n");
         printf("\n\t\tName:Akkhar Ulok\n\t\tID:181-15-11207\n\t\tSECTION:D");
         printf("\n\n\t\t\tThis is an c project\n\t===========================================================");
         printf("\n\t\t\tPress any key to continue....");
         getch();
          system("CLS");
         menu();
         break;



    default:

        printf("\n\t\t\tPlease Enter Valid Option....");
        printf("\n\t\t\tPress any key to continue....");
        getch();
        system("CLS");
        menu();
        break;
    }



}
}