#include <stdio.h>

#include <stdlib.h>

#include <string.h>

/* ~~ LOGIN SYSTEM, ATM SIMULATION, MANIPULATION OF FILE I/O.

LAST UPDATED JULY 29th, 2016 ~~ */

void init(void);

void options(void);

void framework(int option);

float add_to_chequings(float nChequings, float iChequings, float addChequings);

float sub_from_chequings(float nChequings, float iChequings, float subChequings);

float add_to_savings(float nSavings, float iSavings, float addSavings);

float sub_from_savings(float nSavings, float iSavings, float subSavings);

void transaction_type(float iSavings, float iChequings);

void withdraw(float iSavings, float iChequings);

void deposit(float iSavings, float iChequings);

void transaction(void);

void transaction_success(float nS, float nC, float nT);

void transaction_failure(float iS, float iC);

void final_info(float nS, float nC, float nT);

void granted(void);

int negative_checker(float nS, float nC, float nT);

void atm(void);

void sign_in(void);

void create_an_account(void);

int main(void) {

init();

return 0;

}

void init(void) {

char pw[20];

iRestart:

system("clear");

printf("\nWELCOME TO THE CHOUDHRY CONSOLIDATED ATM!\n");

printf("_________________________________________\n");

printf("\nWHAT IS THE START-UP ATM KEY?\n -> ");

scanf("%s", pw);

if (strcmp(pw, "1234") == 0) { // START-UP ATM KEY = "1234"

system("clear");

options();

}

goto iRestart;

}

void options(void) {

int option;

stop:

printf("\nWhat would you like to do? (*INPUT INTEGER ONLY*)\n 1 = SIGN IN 2 = CREATE AN ACCOUNT 3 = EXIT\n\n -> ");

scanf("%d", &option);

system("clear");

if (option == 3) {

exit(EXIT_SUCCESS); //sys.exit() equivalent

} else if (option == 1 || option == 2) {

framework(option); //calling framework for atm

}

goto stop;

}

void framework(int option) {

if (option == 1) {

sign_in();

} else {

create_an_account();

}

}

void create_an_account(void) { //create an account

char user[50], pwd[50];

printf("MENU ~ CREATE AN ACCOUNT\n");

printf("------------------------");

printf("\nUsername: ");

scanf("%s", user);

printf("PIN #: ");

scanf("%s", pwd);

FILE *file;

file = fopen("accounts.csv", "a");

fprintf(file, "%s,%s,%s\n", user, pwd, "\0");

fclose(file);

system("clear");

printf("\nSuccesfully Created Account! ~ \n");

options();

}

void sign_in(void) { //sign in

char user[50], pwd[50], line[50];

printf("MENU ~ SIGN IN\n");

printf("--------------");

tRestart:

printf("\nUsername: ");

scanf("%s", user);

printf("PIN #: ");

scanf("%s", pwd);

system("clear");

FILE *file;

file = fopen("accounts.csv", "r");

while (fgets(line, sizeof(line), file) != NULL) {

char *USER = strtok(line, ",");

char *PASSER = strtok(NULL, ",");

int mUsername = strcmp(user, USER);

int mPassword = strcmp(pwd, PASSER);

if (mUsername == 0 && mPassword == 0) {

fclose(file);

granted();

exit(EXIT_SUCCESS); //leave function

}

}

fclose(file);

system("clear");

printf("\nINVALID USERNAME OR PIN #, TRY AGAIN...\n");

goto tRestart;

}

void granted(void) {

system("clear");

printf("\n * Authentication Successful *");

printf("\n * Welcome to the C.C ATM! *");

printf("\n ----------$$$----------\n\n");

atm();

}

void atm(void) {

float iChequings;

float iSavings;

printf("INITIAL VALUE for each type of account?\n\nCHEQUINGS -> $");

scanf("%f", &iChequings);

printf("SAVINGS -> $");

scanf("%f", &iSavings);

printf("~~~~~~~~~~~~~~~~~~~~~~\n");

float iTotal = iChequings + iSavings;

printf("INITIAL ACCOUNT VALUE -> $%.2f\n", iTotal);

transaction_type(iSavings, iChequings);

}

void transaction_type(float iSavings, float iChequings) {

int CHOICE;

printf("\nWould you like to WITHDRAW, DEPOSIT, or RETURN TO MAIN MENU?\n");

printf(" 1 = WITHDRAW 2 = DEPOSIT 3 = RETURN TO MAIN MENU\n\n -> ");

scanf("%d", &CHOICE);

if (CHOICE == 1) {

withdraw(iSavings, iChequings);

} else if (CHOICE == 2) {

deposit(iSavings, iChequings);

} else {

system("clear");

options();

}

}

void withdraw(float iSavings, float iChequings) {

int CHOICE;

char type[] = "WITHDRAW";

float subSavings, subChequings;

float nSavings, nChequings, nTotal;

KONG:

printf("\nWhich account would you like to %s from?\n", type);

printf(" 1 = CHEQUINGS 2 = SAVINGS\n\n -> ");

scanf("%d", &CHOICE);

if (CHOICE == 1) {

nChequings = sub_from_chequings(nChequings, iChequings, subChequings);

nSavings = iSavings;

nTotal = nChequings + nSavings;

int x = negative_checker(nSavings, nChequings, nTotal);

if (x == 1) {

transaction_success(nSavings, nChequings, nTotal);

} else if (x == 0) {

transaction_failure(iSavings, iChequings);

} else {

goto KONG;

}

} else if (CHOICE == 2) {

nSavings = sub_from_savings(nSavings, iSavings, subSavings);

nChequings = iChequings;

nTotal = nSavings + nChequings;

int x = negative_checker(nSavings, nChequings, nTotal);

if (x == 1) {

transaction_success(nSavings, nChequings, nTotal);

} else if (x == 0) {

transaction_failure(iSavings, iChequings);

} else {

goto KONG;

}

}

}

void deposit(float iSavings, float iChequings) {

int CHOICE;

char type[] = "DEPOSIT";

float addSavings, addChequings;

float nSavings, nChequings, nTotal;

KONG:

printf("\nWhich account would you like to %s money into?\n", type);

printf(" 1 = CHEQUINGS 2 = SAVINGS\n\n -> ");

scanf("%d", &CHOICE);

if (CHOICE == 1) {

nChequings = add_to_chequings(nChequings, iChequings, addChequings);

nSavings = iSavings;

nTotal = nChequings + nSavings;

int x = negative_checker(nSavings, nChequings, nTotal);

if (x == 1) {

transaction_success(nSavings, nChequings, nTotal);

} else if (x == 0) {

transaction_failure(iSavings, iChequings);

} else {

goto KONG;

}

} else if (CHOICE == 2) {

nSavings = add_to_savings(nSavings, iSavings, addSavings);

nChequings = iChequings;

nTotal = nSavings + nChequings;

int x = negative_checker(nSavings, nChequings, nTotal);

if (x == 1) {

transaction_success(nSavings, nChequings, nTotal);

} else if (x == 0) {

transaction_failure(iSavings, iChequings);

} else {

goto KONG;

}

}

}

float add_to_chequings(float nChequings, float iChequings, float addChequings) {

printf("\nHow much?\n\n -> $");

scanf("%f", &addChequings);

nChequings = iChequings + addChequings;

return nChequings;

}

float sub_from_chequings(float nChequings, float iChequings, float subChequings) {

printf("\nHow much?\n\n -> $");

scanf("%f", &subChequings);

nChequings = iChequings - subChequings;

return nChequings;

}

float add_to_savings(float nSavings, float iSavings, float addSavings) {

printf("\nHow much?\n\n -> $");

scanf("%f", &addSavings);

nSavings = iSavings + addSavings;

return nSavings;

}

float sub_from_savings(float nSavings, float iSavings, float subSavings) {

printf("\nHow much?\n\n -> $");

scanf("%f", &subSavings);

nSavings = iSavings - subSavings;

return nSavings;

}

void transaction_failure(float iS, float iC) {

char msg[] = "\nTransaction Incomplete!\nNot enough $$$'s... try again.";

printf("%s\n", msg);

transaction_type(iS, iC);

}

void transaction_success(float nS, float nC, float nT) {

char msg[] = "\nSuccessful Transaction!";

char quest[] = "1 = MAKE ANOTHER TRANSACTION\n2 = VIEW FINAL BALANCE\n3 = EXIT";

int CHOICE;

printf("%s\n", msg);

printf("-----------------------\n");

printf("%s\n\n-> ", quest);

scanf("%d", &CHOICE);

for(;;) {

if (CHOICE == 1) {

transaction_type(nS, nC);

} else if (CHOICE == 2) {

final_info(nS, nC, nT);

} else {

exit(EXIT_SUCCESS);

}

break; //edit this, break; and loop are pointless here

}

}

int negative_checker(float nS, float nC, float nT) {

if (nC < 0 || nS < 0 || nT < 0) {

return 0;

} else {

return 1;

}

}

void final_info(float nS, float nC, float nT) {

char banner[] = "\nFinal Balance!";

char line[] = "--------------";

printf("%s\n%s\n", banner, line);

printf("CHEQUINGS -> $%.2f\n", nC);

printf("SAVINGS -> $%.2f\n", nS);

printf("~~~~~~~~~~~~~~~~~~~~~~\n");

printf("TOTAL ACCOUNT VALUE -> $%.2f\n\n", nT);

}