The realization of 1207--ATM automatic teller machine

#include <stdio.h>

#include <stdlib.h>

#include <stdbool.h>

Prompt user Action

void alert (char *content);

/*

Check that the input is legal

Maxnum: Maximum range 5 (1-5)

*/

int getvalidoperation (int maxnum);

Check balance

void query ();

Exit program

void quit (int status);

Whether to continue the operation

void Iscontinue ();

Enter password

BOOL Inputpassword ();

Withdrawal

void Takemoney ();

Defining Global Variables

int Totalmoney = 1000;//Total Amount

int password = 12345;//password

BOOL islogined = false; Record the status of the login

int main (int argc, const char * argv[]) {

int operation = 0; Record Final selection

while (1) {

Prompt user Action

Alert ("1. Enter the password \n2. Withdrawal \n3. query \n4. Exit \ n");

Judging whether it is legal

Operation = Getvalidoperation (4);

BOOL result;

Handling of user actions

Switch (operation) {

Case 1:

Enter password

result = Inputpassword ();

if (result = = False) {

Password Error exit

Quit (exit_success);

} else {

Record status

Islogined = true;

}

Ask if you want to continue operation

Iscontinue ();

Break

Case 2:

Withdrawal

Takemoney ();

Iscontinue ();

Break

Case 3:

Inquire

Query ();

Iscontinue ();

Break

Case 4:

Exit

Quit (exit_success);

Break

Default

Break

}

}

return 0;

}

void alert (char *content) {

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

printf ("%s", content);

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

}

int getvalidoperation (int maxnum) {

int operation;//record user input actions

Prompt user to select action

printf ("Please select operation:");

scanf ("%d", &operation);

Judging whether it is legal

while (Operation < 1 | | operation > Maxnum) {

printf ("Input error, please re-enter:");

scanf ("%d", &operation);

}

Already got a legit one.

return operation;

}

void quit (int status) {

Show a bit of content to the user

Alert ("Welcome to next use \ n");

Exit (status);

}

void query () {

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

printf ("Balance of $%d\n", Totalmoney);

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

}

void Iscontinue () {

char choice;

printf ("Do you want to continue?" ( y/n): ");

Throw away the last input ' \ n '

GetChar ();

Get the input for this time

scanf ("%c", &choice);

while (choice! = ' Y ' && choice! = ' n ') {

printf ("Input error (y/n):");

GetChar ();

scanf ("%c", &choice);

}

if (choice = = ' n ') {

Quit (exit_success);

}

}

BOOL Inputpassword () {

int inputedpassword = Int32_max;

int totalwrongtime = 3;

do {

printf ("%s:", Inputedpassword = = Int32_max?) Please enter the password ":" Password error please re-enter ");

scanf ("%d", &inputedpassword);

Consume One Chance

totalwrongtime--;

} while ((Inputedpassword! = password) && totalwrongtime > 0);

Determine if the password is entered correctly

if (Inputedpassword! = password) {

return false;

} else{

return true;

}

}

void Takemoney () {

To determine if a password has been entered

if (islogined = = False) {

No login

BOOL result = Inputpassword ();

if (result = = False) {

Password Error exit

Quit (exit_success);

} else {

Record status

Islogined = true;

}

} else {

1. Hint Limit

Alert ("1.$100\n2.$200\n3.$500\n4. return \ n");

Judging input

int operation = Getvalidoperation (4);

int Outmoney = 0;

Switch (operation) {

Case 1:

100

Outmoney = 100;

Break

Case 2:

200;

Outmoney = 200;

Break

Case 3:

500

Outmoney = 500;

Break

Case 4:

Return

Break

Default

Break

}

Show withdrawal Amount

if (Totalmoney < Outmoney) {

Alert ("Insufficient balance \ n");

} else{

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

printf ("Withdrawal%d balance%d\n", Outmoney, Totalmoney-= Outmoney);

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

}

}

}

The realization of 1207--ATM automatic teller machine