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

int withdraw;
int money[2];
int n=0,p;
int saldis;
int i;

void valinnat();
void vaihtoehdot();
void lueJotain (void);
int lueintti (void);

int main(void)
{
    char tilinum [112];
    FILE *tili;
    char pinni [1234];
    char checkPIN[1234];
    int paatti;


    do{
        printf("\n Enter account number:");
        fgets(tilinum, 112 , stdin);
        if ( tilinum [ strlen(tilinum) -1] == '\n')
            tilinum [ strlen(tilinum) -1] = '\0';
        else lueJotain();

        strcat (tilinum, ".tili");

        if( (tili = fopen( tilinum, "r"))!=NULL){
                printf(" Enter pin-code:");

                fgets(pinni, 1234 , stdin);

                if ( pinni [ strlen(pinni) -1] == '\n')
                    pinni [ strlen(pinni) -1] = '\0';
                else lueJotain();

                fgets(checkPIN, 1234 , tili);

                do {

                    if ( checkPIN [ strlen(checkPIN) -1] == '\n')
                        checkPIN [ strlen(checkPIN) -1] = '\0';
                    if ( checkPIN [ strlen(checkPIN) -1] == '\r')
                    checkPIN [ strlen(checkPIN) -1] = '\0';

                    if ((paatti = strcmp(pinni, checkPIN)) == 0){
                        fscanf(tili, "%d", &saldis);
                        valinnat();
                    }else
                        printf(" Incorrect, Try again");
                }while ( !paatti );


        }else{
            printf("\n Account is closed");
        }

    }while(1);

    return 0;
}

void lueJotain(void){
    while (fgetc(stdin) != '\n');
}

void valinnat() {
    while (i !=3)
    {
        printf("Tervetuloa\n");
        printf("1. Katso saldo\n");
        printf("2. Nosta rahaa\n");
        printf("3. Lopeta\n");
        printf("Syota valinta: ");
        scanf("%d", &i);
        vaihtoehdot();

    }
}
void vaihtoehdot() {

        switch(i)
        {
        case 1:
            printf("\nSaldosi on: %d ", saldis);
            break;

        case 2:
            printf("\n Syota nostosumma: ");
            scanf("%d", &withdraw);
            while (withdraw >20 || withdraw != 30 || withdraw < 1000){
                money[0]=50;
                money[1]=20;
                p=withdraw / money[n];
                withdraw=withdraw % money[n];
                printf("Keraa seteleita %2d : %2d \n", money[n],p);
                n++;

            }
            break;

        case 3:
            printf("Kiitos kaynnista\n");
            break;
        }
}