ATM Program In C

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

FILE *fp;
FILE *ft;
FILE *bl;

void login();
void newacc();
void transaction();
void anothertransaction();
void asklogin();

struct {
	char user[20];
	char pass[20];
	char newuser[20];
	char newpass[20];
} s;

struct balancing {
	float balance;
	float withdrow;
	float deposit;
} b = { 0.000};

char file[255];

int main() {
	char op;
	int num;
	do {
		printf("\n\t\t\t\t\t\t<== WELCOME TO ATM ==>");
		printf("\n\t\tLOG IN\t( L / l ) \n\n\t\tSIGN UP\t( S / s ) \n\n\t\tEXIT\t( E / e ) \n\n\t\tPLEASE SELECT YOUR CHOICE --> ");
		scanf("%c", &op);
		switch (op) {
			case 'S':
			case 's':
				newacc();
				break;
			case 'L':
			case 'l':
				login();
				break;
			case 'E':
			case 'e': 
			       exit('e');
				break;
				printf("\t\tError ......  please Select Valid Option");
		}
		printf("\n\t\t <== Do you Want To Do It Again ==> \n\t\tPRESS [ 1 ] -->\t \n\n");
		scanf("%d",&num);
		if(num==1){
			main();
		}
		printf("\n\t<== Press any key to continue ==>\n");
		getch();
	} while (op == 'e' || op == 'E');
	return 0;
}
//..................................................... Log in Program ...........................................................................
void login() {
	int found = 0 ;
	fp = fopen("atm.txt", "rb");
	printf("\t\tEnter Your Username --> ");
	scanf("%s", &s.user);
	printf("\n\t\tEnter Your Password --> ");
	scanf("%s", &s.pass);
	printf("\n\t\tThe Username Is %s And The Password Is %s\n", s.user, s.pass);
	if (fp == NULL) {
		printf("\tFile is empty");
	} else {
		int u = 0;
		int p = 0;
		int c = 0;
		while (fscanf(fp, "%s", &file) == 1) {
			char *fds = strtok(file, ";");
			while (fds != NULL) {
				if (c == 0) {
					if (strcmp(fds, s.user) == 0) {
						u = 1;
					}
					c++;
				} else {
					if (strcmp(fds, s.pass) == 0) {
						if (u == 0) {
							p = 0;
						} else
							p = 1;
					}
					c = 0;
				}
				fds = strtok(NULL, " ");
			}
			if (u == 1 && p == 1) {
				found = 1;
				printf("\n\t\t <<== Access Granted ==>>\n");
				bl=fopen("Balancing.txt","a+");
				fputs(s.user,bl);
				fputs(";",bl);
				fputs(s.pass,bl);
				fputs("\n\n",bl);
				fclose(bl);
				transaction();
				break;
			}

//			else{
//				printf("\n\tAccess Denied\n");
//				printf("\n\t<== Sorry You Need to Make Your Account First Then you Will Able TO Continue ==> \n ");
		}
	}
	if(found == 0 ){
		printf("\n\t\t\t\t\t<== Account Not Found ==> \n\n");
	}
}
//............................................................... New Account ......................................................................
void newacc() {
	char number[11];
	char name[20];
	char email[50];
	ft=fopen("info.txt","a+");
	fp = fopen("atm.txt", "a+");
	printf("\n\t\tEnter Your Username --> ");
	scanf("%s",s.newuser);
	fputs(s.newuser, fp);
	fputs(s.newuser,ft);
	fputs("\t\t\t",ft);
	fputs(";", fp);
	printf("\n\t\tEnter Your Password --> ");
	scanf("%s",s.newpass);
	fputs(s.newpass, fp);
	fputs(s.newpass,ft);
	fputs("\t\t\t",ft);
	fputs("\n", fp);
	printf("\n\t\tEnter Your Number --> ");
	scanf("%s",&number);
	fputs(number,ft);
	fputs("\t\t\t",ft);
	printf("\n\t\tEnter Your Name --> ");
	scanf("%s",&name);
	fputs(name,ft);
	fputs("\t\t\t",ft);
	printf("\n\t\tEnter Your E-mail --> ");
    scanf("%s",email);
	fputs(email,ft);
	fputs("\n",ft);
	printf("\n\t\tNow you are successfully Signed\n\n\t\t\t\t<== Thanks==>\n\n");
	fclose(fp);
	fclose(ft);
	asklogin();
}
//...............................................................Transaction ........................................................................
void transaction() {
	int ch;
	printf("\t\t\t\t\t\t<== WELCOME ==> \n");
	printf("\n\t\t1. Withdrow \n");
	printf("\n\t\t2. Deposit \n");
	printf("\n\t\t3. Balance \n");
	printf("\n\t\tChoice Your Choice : ");
	scanf("%d",&ch);
	switch(ch) {
		case 1:
			printf("\n\t\tHow Much Money You Wanna Withdrow --> ");
			scanf("%f",&b.withdrow);
			if(b.withdrow > b.balance) {
				printf("\n\t\tInsuffient Balance ");
			}
			else{
			    b.balance = b.balance - b.withdrow;
				printf("\n\t\tYour Current balance is : %f",b.balance);
			}
			anothertransaction();
			break;
		case 2:
			printf("\n\t\tHow Much Money You Wanna Deposit --> ");
			scanf("%f",&b.deposit);
			b.balance = b.balance + b.deposit;
			printf("\n\t\tYour Current Balance : %f",b.balance);
			anothertransaction();
			break;
		case 3: 
	     	printf("\n\t\tYour Current Balance Is --> %f",b.balance);
	     	anothertransaction();
		default : printf("\n\t\t<<== Please Choose a Valid Reason ==> \n\n");
	}
}
//.........................................................Another Transacation ..................................................................
void anothertransaction() {
	int at;
	printf("\n\t\tDo You Want To Another Transaction \n\t\tThen Please press ( 1 ) --> ");
	scanf("%d",&at);
	if(at==1) {
		transaction();
	}
	else 
	{
		printf("\t\t\t\t\t\t<== Thanks For Using Our ATM ==>  \n");
	}
}
//.......................................................Aking For log in after Signing Up .......................................................
void asklogin(){
	int num;
	printf("\n\t\tDO YOU WANT TO LOG IN PRESS ( 1 )  --> ");
	scanf("%d",&num);
	if(num==1){
		login();
	}
	else 
	{
		printf("\t\t\t\t\t\t<== Thanks For Using Our ATM ==>  \n");
	}
}