project

#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<stdlib.h>   //for using styme("CLS")
#define ENTER 13
//subfunction diclaration
void login();
void menu();

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;
    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]Search\t\t*\n");
    printf("\t\t\t*\t  [3]Delete\t\t*\n");
    printf("\t\t\t*\t  [4]About\t\t*\n");
    printf("\t\t\t*\t  [5]Exit\t\t*\n");
    printf("\t\t\t*\t  [1]Data Entry\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);
    system("CLS");
    switch(choise)
    {
    case 5:
        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


        }



    }
}