1 Attachment(s)
Use function prototype and function definition in ATM menu
Dear all,
I m a newbie in C. When do the questions in "C Programming for Absolute Beginners" (MICHAEL VINE, 2008)
When talked about structure programming, there is a question.
Write A function that prints an ATM menu—it receives no
parameters and returns no value.
Attachment 12395
Then i write the following:
Code:
Void displaymenu()
/*********************
Function Prototypes
*********************/
Int display_balance();
Int deposit_funds();
Int transfer_funds();
Int withdraw_funds();
Int get_available_balance();
Int compare_balance_to_request();
Int update_account();
Int disperse_funds();
Int reject_request();
Int print_receipt();
Int verify_ample_funds_exist();
Int initiate_mechanical_process();
Int update_bank_records();
Int atm_lv1() = 0;
Int atm_lv2() =0;
Int atm_lv3() =0;
main()
{
Do
{
System(“Clear”);
Printf(“\n\t Welcome to ATM\n\n”);
Printf(“1\tDisplay Balance\n”);
Printf(“2\tDeposit Funds\n”);
Printf(“3\tTransfer Funds\n”);
Printf(“4\tWithdraw Funds\n”);
Printf(“5\tQuit\n”);
Printf(“\n\n Choose number\n”);
Scanf(“%d”, &atm_lv1);
Switch(atm_lv1) {
Case 1:
Int display_balance(); // Suppose another function calling for the account?
Printf(“Your Balance is”);
Break;
Case 2:
Int Deposit_funds(); //another interface to detect the amount of banknotes?
Break;
Case 3:
Int Transfer_funds(); //Transfer the amount of fund, enter another account
Break;
Case 4:
Int Withdraw_fund();
Break;
}
} while (atm_lv1!=5);
}// end of ATM level 1
/***************
Function Definition
****************/
//display balance
Int display_balance();
{
Printf(“Your account balance is”);
}
//disposit fund
Int Deposit_funds();
{
Printf(“You have deposit to your account”);
}
//transfer fund
Int transfer_funds();
{
Printf(“You have transferred funds”);
}
//withdraw fund
Int withdraw_funds();
{
Do
{
System(“Clear”);
Printf(“\n\t Withdraw funds options \n\n”);
Printf(“1\tGet Available Balance\n”);
Printf(“2\tCompare Balance to Request\n”);
Printf(“3\tUpdate Account\n”);
Printf(“4\tDisperse Funds\n”);
Printf(“5\tReject Request\n”);
Printf(“6\tPrint Receipt\n”);
Printf(“7\tReturn\n”);
Printf(“\n\n Choose number\n”);
Scanf(“%d”, &atm_lv2);
Switch(atm_lv2) {
Case 1:
Int get_available_balance();
Break;
Case 2:
Int compare_balance_to_request();
Break;
Case 3:
Int update_account ();
Break;
Case 4:
Int disperse_fund();
Break;
Case 5:
Int reject_request();
Break;
Case 6:
Int print_receipt();
Break;
Case 7:
Int main();
Break;
}
} while (atm_lv2!=8);
}// end of ATM level 2
/***************
Function Definition
****************/
//Get available balance
Int get_available_balance();
{
Printf(“Your available balance is”);
}
//Compare balance to request
Int compare_balance_to_request();
{
Printf(“Your balance is compared”);
}
//update account
Int update_account();
{
Printf(“Your account is updated”);
}
//disperse funds
Int disperse_fund(int);
{
Do
{
System(“Clear”);
Printf(“\n\t Select the Disperse Funds Action”);
Printf(“1\tVerify Ample Fund\n”);
Printf(“2\tInitiate Mechanical Process\n”);
Printf(“3\tUpdate Bank Record\n”);
Scanf(“%d”,&atm_lv3);
Switch(atm_lv3){
Case 1:
Int verify_ample_funds_exist();
Case 2:
Int initiate_mechanical_process();
Case 3:
Int update_bank_records();
} while(atm_lv3!=4);
} //end of atm lv3
//reject request
Int reject_request(int);
{
Printf(“Your request is rejected”);
}
//print receipt
Int print_receipt();
{
Printf(“Your receipt is being printed”);
}
//Verify amply funds
Int verify_ample_funds_exist();
{
Printf(“Your fund is verified”);
}
//initiate mechanical process
Int initiate_mechanical_process();
{
Printf(“Mechanical process initiated”);
}
//update bank record
Int update_bank_records();
{
Printf(“Bank records updated”);
}
