Thread: I need to create a running balance once the user enters the value for savings, ect.

I am having trouble creating the void functions and assigning the pointers so that I can have a running balance for the checking and savings balances.

insert

Code:

#include <stdio.h>




void add_acc();
void deposit(savings, depositAmount);
void withdrawal(savings, withDrawalAmount);
void transfer(transfer, transFer, savings, checking, transferAmount);
void acc_info();
void transaction();


int main()
{
    int        choice;
    float    accountBalance, depositAmount =0, withDrawalAmount, savingsBalance, checkingBalance, transferAmount;
    char    Exit;


    double *savings, *checking;


    savings = &savingsBalance;
    checking = &checkingBalance;




    Exit = 'N';


    while (Exit = 'N')
    {


        printf("1. Create New Account\n");
        printf("2. Cash Deposit\n");
        printf("3. Cash Withdrawl\n");
        printf("4. Fund Transfer\n");
        printf("5. Account Information\n");
        printf("6. Transaction Information\n");
        printf("7. Exit\n");
        printf("\n");
        printf("Press a choice between the range of [1-7]");
        scanf_s("%d", &choice);


        switch (choice)
        {
        case 1:
            printf("Adding a new account is not possible at this time:\n ");
            scanf_s("%d", &choice);
            break;


        case 2:
            printf("Process a cash deposit.\n");
            printf("Enter the current account balance\n");
            scanf_s("%f", &savings);
            printf("Enter the amount of the deposit\n");
            scanf_s("%f", &depositAmount);


            printf("Your new balance is: $%.2f\n", deposit);
            scanf_s("%.2f", &savings);
            break;


        case 3:
            printf("Process a cash withdrawal.\n");
            printf("The current savings account balance is: %.2f \n", savings);
            printf("Enter the amount to be withdrawn\n");
            scanf_s("%f", &withDrawalAmount);


            printf("The new balance is: $%.2f\n", withdrawal);
            break;


        case 4:
            printf("Transfer funds from savings to checking.\n");
            printf("The current savings account balance is %.2f \n", savings);
            printf("Enter the current checking account balance\n");
            scanf_s("%f", &checkingBalance);
            printf("Enter the amount to be transferred\n");
            scanf_s("%f", &transferAmount);


            printf("The new savings account balance is: $%.2f\n", transfer);


            printf("\n");


            printf("The new checking account balance is: $%.2f\n", transFer);
            break;


        case 5:
            printf("Customer account balances.\n");
            printf("Your savings account balance is: $%.2f", savings);
            printf("Your checking account balance is: $%.2f", checking);
            break;


        case 6:
            printf("There is no transaction history availavle at this time.\n");
            scanf_s("%d", &choice);
            break;


        case 7:
            printf("Are you sure you want to exit, Y-yes:N-no:");
            scanf_s(" %c", &Exit);
            if (Exit == 'Y' || Exit == 'y')
            {
                return 0;
            }
            break;


        default:
            printf("That wasn't 1-7... Please re-enter a number between (1-7)\n");
            break;


        }
    }
    return 0;
}
void deposit(double savings, float depositAmount)
{
    return savings + depositAmount;
}
void withdrawal(double savings, float withDrawalAmount)
{
    return savings - withDrawalAmount;
}
void transfer(transfer, transFer, savings, checking, transferAmount )
{
    if (transfer)
    {
        return savings - transferAmount;
    }
    else (transFer);
    {
        return checking + transferAmount;
    }
}

Yes, I would get warnings about changing them to double. This code has so much wrong with it. It won't run. I stopped because I wasn't sure if I was using the prototypes and pointers the right way. In my transfer, I don't know how to set it up so that I can use both the subtraction and addition in the same function.

Plus, if you are returning data from the function, don't declare it as void.

Code:

double deposit(double savings, float depositAmount)
{
    return savings + depositAmount;
}

"void" only if the function does NOT return a value! I didn't check for other errors. Start over with the suggestions @Salem made.

Okay, so I started back with my working program. How do I create a balance that is kept after the user enters it the first time? So at the first prompt where it asks to enter your account balance, I want that to be what I call on to add or subtract from and it stores the new value. I think I am just using the wrong syntax for pointers. Can someone please help?

Code:

#include<stdio.h>
float add_acc();
float deposit(float accountBalance, float depositAmount);
float withdrawal(float accountBalance, float withDrawalAmount);
float s_transfer(float savingsBalance, float transferAmount);
float c_transfer(float checkingBalance, float transferAmount);




int main()
{
	int		choice;
	float	accountBalance, depositAmount, withDrawalAmount, savingsBalance, checkingBalance, transferAmount;
	char	Exit;




	Exit = 'N';


	while (Exit = 'N')
	{


		printf("1. Create New Account\n");
		printf("2. Cash Deposit\n");
		printf("3. Cash Withdrawl\n");
		printf("4. Fund Transfer\n");
		printf("5. Account Information\n");
		printf("6. Transaction Information\n");
		printf("7. Exit\n");
		printf("\n");
		printf("Press a choice between the range of [1-7]");
		scanf("%d", &choice);


		switch (choice)
		{
		case 1:
			printf("Adding a new account is not possible at this time:\n ");
			scanf("%d", &choice);
			break;


		case 2:
			printf("Process a cash deposit.\n");
			printf("Enter the current account balance\n");
			scanf("%f", &accountBalance);
			printf("Enter the amount of the deposit\n");
			scanf("%f", &depositAmount);


			printf("Your new balance is: $%.2f\n", deposit(accountBalance, depositAmount));
			break;


		case 3:
			printf("Process a cash withdrawal.\n");
			printf("Enter the current account balance\n");
			scanf("%f", &accountBalance);
			printf("Enter the amount to be withdrawn\n");
			scanf("%f", &withDrawalAmount);


			printf("The new balance is: $%.2f\n", withdrawal(accountBalance, withDrawalAmount));
			break;


		case 4:
			printf("Transfer funds from savings to checking.\n");
			printf("Enter the current savings account balance\n");
			scanf("%f", &savingsBalance);
			printf("Enter the current checking account balance\n");
			scanf("%f", &checkingBalance);
			printf("Enter the amount to be transferred\n");
			scanf("%f", &transferAmount);


			printf("The new savings account balance is: $%.2f\n", s_transfer(savingsBalance, transferAmount));


			printf("\n");


			printf("The new checking account balance is: $%.2f\n", c_transfer (checkingBalance, transferAmount));
			break;


		case 5:
			printf("Customer account holder information is unavailale at this time.\n");
			scanf("%d", &choice);
			break;


		case 6:
			printf("There is no transaction history availavle at this time.\n");
			scanf("%d", &choice);
			break;


		case 7:
			printf("Are you sure you want to exit, Y-yes:N-no:");
			scanf(" %c", &Exit);
			if (Exit == 'Y' || Exit == 'y')
			{
				return 0;
			}
			break;


		default:
			printf("That wasn't 1-7... Please re-enter a number between (1-7)\n");
			break;


		}
	}
	return 0;
}


float add_acc()
{


}
float deposit(float accountBalance, float depositAmount)
{
	return accountBalance + depositAmount;
}
float withdrawal(float accountBalance, float withDrawalAmount)
{
	return accountBalance - withDrawalAmount;
}
float s_transfer(float savingsBalance, float transferAmount)
{
	return savingsBalance - transferAmount;
}
float c_transfer(float checkingBalance, float transferAmount)
{
	return checkingBalance + transferAmount;
}