i know everyone hates hw help but i just need some help getting started with writing the functions. here is what i have so far:
/* ATM Simulator Function Source File atm.c
**
** CSC-234 (M. Hutchenreuther) John Jones
** Assignment 8 Part A Section 1
** November 9, 2005
**
** Program: Automatic Teller Machine Simulator -- Transfer Menu
**
** Description: This file contains the function definitions.
**
** Included functions: ShowBal()
** Deposit()
** Withdraw()
** TranMenu()
** Transfer()
**
** Revision History: Created 8/7/01 by John Jones.
** Added TranMenu() and ShowBal
** to Withdraw(), Deposit(), and Transfer().
*/
#include <stdio.h>
#include "atm.h"
int main(void)
{
char szChckName [] = "Checking";
char szSaveName [] = "Savings";
char szVisaName [] = "Mustang Visa";
double dAcctBal = 600.00;
return 0;
}
/* Function ShowBal()
**
** Description: This function displays the current account balance.
**
** Variables:
** Name Type Intent Purpose Units Range
** szAcctName char[] in Name of account n/a n/a
** dAcctBal double in Account balance n/a n/a
**
** Inputs: none
** Outputs: szAcctName, dAcctBal
**
** Preconditions: none
** Post-Conditions: Account balance is displayed.
**
** Arguments: szAcctName, dAcctBal
** Returns: nothing
*/
void ShowBal (char szAcctName[], double dAcctBal)
{
printf ("Your %s account balance is $%.2lf.\n",
szAcctName, dAcctBal);
}
/* end function ShowBal() */
/* Function Deposit()
**
** Description: This function prompts the user for an amount to
** deposit, gets that amount, and adjusts the balance.
**
** Variables:
** Name Type Intent Purpose Units Range
** szAcctName char[] in Name of account n/a n/a
** pdAcctBal *double in/out Account balance n/a n/a
** dInput double n/a Amount to deposit n/a n/a
**
** Inputs: dInput
** Outputs: szAcctName, dAcctBal
**
** Preconditions: none
** Post-Conditions: Account balance is increased by input amount.
**
** Arguments: szAcctName, *dAcctBal
** Returns: nothing
*/
void Deposit (char szAcctName[], double *pdAcctBal)
{
if (dInput <= 0.0)
printf ("Invalid amount.\n");
else
pdAcctBal = dAcctBal + dInput;
ShowBal (szAcctName, *pdAcctBal);
}
/* end function Deposit() */
/* Function Withdraw()
**
** Description: This function prompts the user for an amount to
** withdraw, gets that amount, and adjusts the balance.
**
** Variables:
** Name Type Intent Purpose Units Range
** szAcctName char[] in Name of account n/a n/a
** dAcctBal *double in/out Account balance n/a n/a
** dInput double n/a Amount to withdraw n/a n/a
**
** Inputs: dInput
** Outputs: szAcctName, *dAcctBal
**
** Preconditions: none
** Post-Conditions: Account balance is decreased by input amount.
**
** Arguments: szAcctName, *dAcctBal
** Returns: nothing
*/
void Withdraw (char szAcctName[], double *pdAcctBal)
{
printf ("Not implemented yet.\n");
/* your algorithm and code goes here */
ShowBal (szAcctName, *pdAcctBal);
}
/* end function Withdraw() */
/* Function TranMenu()
**
** Description: This function prompts the user with a choice of
** accounts to transfer to or from.
**
** Variables:
** Name Type Intent Purpose Units Range
** szSourName char[] in Name of source account n/a n/a
** pdSourBal *double in/out Source account balance n/a n/a
** szDest1Name char[] in Name of destin account n/a n/a
** pdDest1Bal *double in/out Destin account balance n/a n/a
** szDest2Name char[] in Name of destin account n/a n/a
** pdDest2Bal *double in/out Destin account balance n/a n/a
** cWhich char n/a User choice n/a n/a
**
** Inputs: cWhich
** Outputs: None
**
** Preconditions: none
** Post-Conditions: none.
**
** Arguments: szSourName, *pdSourBal, szDest1Name, *pdDest1Bal
** szDest2Name, *pdDest2Bal
** Returns: nothing
*/
void TranMenu (char szSourName[], char szDest1Name[], char szDest2Name[],
double *pdSourBal, double *pdDest1Bal, double *pdDest2Bal)
{
char cWhich = 'x';
printf ("Please choose from the following:\n");
printf ("Enter A to transfer from %s to %s,\n", szSourName, szDest1Name);
printf (" B to transfer from %s to %s,\n", szSourName, szDest2Name);
printf (" C to transfer from %s to %s,\n", szDest1Name, szSourName);
printf (" or D to transfer from %s to %s:\n", szDest2Name, szSourName);
scanf ("\n%c", &cWhich);
cWhich = toupper (cWhich);
switch (cWhich)
{
case 'A':
Transfer (szSourName, pdSourBal, szDest1Name, pdDest1Bal);
break;
case 'B':
Transfer (szSourName, pdSourBal, szDest2Name, pdDest2Bal);
break;
case 'C':
Transfer (szDest1Name, pdDest1Bal, szSourName, pdSourBal);
break;
case 'D':
Transfer (szDest2Name, pdDest2Bal, szSourName, pdSourBal);
break;
default:
printf ("Invalid choice %c.\n", cWhich);
break;
}
/* end switch cWhich */
}
/* end function Transfer() */
/* Function Transfer()
**
** Description: This function prompts the user for a destination
** account and an amount to transfer to or from that
* account, gets that amount, and adjusts the balance.
**
** Variables:
** Name Type Intent Purpose Units Range
** szSourName char[] in Name of source account n/a n/a
** pdSourBal *double in/out Source account balance n/a n/a
** szDestName char[] in Name of destin account n/a n/a
** pdDestBal *double in/out Destin account balance n/a n/a
** dInput double n/a Amount to transfer n/a n/a
**
** Inputs: dInput
** Outputs: szSourName, pdSourBal, szDestName, pdDestBal
**
** Preconditions: none
** Post-Conditions: Input amount is transferred between accounts.
**
** Arguments: szSourName, *pdSourBal, szDestName, *pdDestBal
** Returns: nothing
*/
void Transfer (char szSourAcct[], double *pdSourBal,
char szDestAcct[], double *pdDestBal)
{
printf ("Not implemented yet.\n");
/* your algorithm and code goes here */
ShowBal (szSourAcct, *pdSourBal);
ShowBal (szDestAcct, *pdDestBal);
}
/* end function Transfer() */
/* end file atm.c */
/* Automatic Teller Machine Simulator Header File atm2.h
**
** CSC-234 (M. Hutchenreuther) John Jones
** Assignment 8 Parts A and B Section 1
** November 9, 2005
**
** Program: Automatic Teller Machine Simulator -- Transfer Menu
**
** Description: This file contains only the function prototypes. The
** function definitions are in file atm.c.
**
** Included functions: ShowBal()
** Deposit()
** Withdraw()
** TranMenu()
** Transfer()
**
** Revision History: Created 8/7/01 by John Jones.
*/
extern void ShowBal (char[], double);
/* acct name and balance */
extern void Deposit (char[], double*);
/* acct name and balance */
extern void Withdraw (char[], double*);
/* acct name and balance */
extern void TranMenu (char[], char[], char[], double*, double*, double*);
extern void Transfer (char[], double*, char[], double*);
/* source acct name and balance, destination acct name and balance */
/* end file atm.h */i have to complete the Deposit, Withdraw, and Transfer functions, but am not quite sure where to go. i started the deposit function but didn't get very far. if anyone has any hints or pointers i would really appreciate it! thank you!