Student Question3

[Nezmin2]

Ok Guy's,
My instructor gave me this feedback: "Your totals are fine, but your taxes
are off by a factor of 100. Your error checking is effective, but should
terminate the program rather than continuing to show taxes on a $0 purchase.

I honestly have no clue what to do. Any suggestions would be appreciated.

/*Kudler Fine Foods Tax calculator*/
//Description: A C program by Max Maxwell that displays the sales tax amount for each of the store locations based on taxable
//amounts entered by the user.

#include<stdio.h>
#include <stdlib.h>
int main (void)

{
	//declaring variables 
		float Purchase_Amount = 0.0; //Variable for the purchase amount initialized at 0
		float DelMar_TaxRate = 7.25; //Del Mar Tax Rate
		float Encinitas_TaxRate = 7.50; //Encinitas Tax Rate
		float LaJolla_TaxRate = 7.75; //La Jolla Tax Rate
	
	//Welcome Screen
		printf("Kudler Fine Foods Tax Calculation Program\n");
		printf("\nPlease Enter Your Purchase Amount: ");
		if(scanf_s("%f", &Purchase_Amount) !=1) //Error Check and Message
		{
			printf(" That was an Invalid Purchase Amount. Please try again. Example 99.99, enter Zero to exit\n");
		}

		//Calculations For each location//
		//TotalAmount  = PurchaseAmount * DelMarTaxRate / 100.00 + PurchaseAmount
		printf("\nThe Del Mar Tax Rate of 7.25%% adds $%2.2f", DelMar_TaxRate * Purchase_Amount);
		printf(" for a \ntotal of ---------> $%.2f.\n", ((DelMar_TaxRate / 100) * Purchase_Amount) + Purchase_Amount);
		printf("\nThe Encinitas Tax Rate of 7.50%% adds $%2.2f", Encinitas_TaxRate * Purchase_Amount);
		printf(" for a \ntotal of ---------> $%.2f.\n", ((Encinitas_TaxRate / 100) * Purchase_Amount) + Purchase_Amount);
		printf("\nThe La Jolla Tax Rate of 7.75%% adds $%2.2f", LaJolla_TaxRate * Purchase_Amount);
		printf(" for a \ntotal of ---------> $%.2f.\n", ((LaJolla_TaxRate / 100) * Purchase_Amount) + Purchase_Amount);
		printf("\n\n\tThank you and have a nice day!\n\n");
		return 0;
}

[Adak]

Your tax should never be expressed as:

tax rate * purchase amount, when in % format.

Correct is tax rate in per cent format / 100. Percent *means* hundreths.

Your scanf() if statement could be appended to inclucde "...&& purchase_amount > 0.00)

[Elysia]

per cent format[/B] / 100. Percent *means* hundreths.

There is no such thing as per cent...

And it sounds to me, Nezmin2, like you have a problem with incorporating logic.
Therefore, I suggest you make a flow chart first. Then translate it into code.

And I can spot the problem directly, why can't you (it's not a syntactic error; it's a logic error)?

[Nezmin2]

Ok, despite the fact that the word student has gone over certian responders heads, I have gone in and restructured my formulas. Now everything is calculating correctly. However, now I am having issues compiling because of the exit() function.

#include<stdio.h>
#include <stdlib.h>
int main (void)

{
	//declaring variables 
		float Purchase_Amount = 0.0; //Variable for the purchase amount initialized at 0
		float DelMar_TaxRate = 7.25; //Del Mar Tax Rate
		float Encinitas_TaxRate = 7.50; //Encinitas Tax Rate
		float LaJolla_TaxRate = 7.75; //La Jolla Tax Rate
	
	//Welcome Screen
		printf("\t\t\tKudler Fine Foods Tax Calculation Program\n");
		printf("\nPlease Enter Your Purchase Amount: ");
		if(scanf("%f", &Purchase_Amount) !=1) //Error Check and Message
		{
			printf("\nThat was an Invalid Purchase Amount. Please try again. Example 99.99, enter Zero to exit\n");
			exit();
		}

		//Calculations For each location//
		//TotalAmount  = PurchaseAmount * DelMarTaxRate / 100.00 + PurchaseAmount
		printf("\nThe Del Mar Tax Amount equals: $%.2f", Purchase_Amount * DelMar_TaxRate / 100);
		printf("\nfor a \ntotal of ---------> $%.2f.\n", (Purchase_Amount * DelMar_TaxRate / 100) + Purchase_Amount);
		printf("\nThe Encinitas Tax Amount equals: $%.2f", Purchase_Amount * Encinitas_TaxRate / 100);
		printf("\nfor a \ntotal of ---------> $%.2f.\n", (Purchase_Amount * Encinitas_TaxRate / 100) + Purchase_Amount);
		printf("\nThe La Jolla Tax Amount equals: $%.2f", Purchase_Amount * LaJolla_TaxRate / 100);
		printf("\nfor a \ntotal of ---------> $%.2f.\n", (Purchase_Amount * LaJolla_TaxRate / 100) + Purchase_Amount);
		printf("\n\n\tThank you and have a nice day!\n\n");
		return 0;
}

[tabstop]

We realize that you're a student. That doesn't mean we don't expect you to be able to read.

temp.c:18: error: too few arguments to function `exit'

If you can't figure out what's wrong here, and you don't know how to look up exit in the back of your book/in the man page/in Google's man page, then why do you think we can do anything for you?

[Nezmin2]

We realize that you're a student. That doesn't mean we don't expect you to be able to read.

temp.c:18: error: too few arguments to function `exit'

If you can't figure out what's wrong here, and you don't know how to look up exit in the back of your book/in the man page/in Google's man page, then why do you think we can do anything for you?

WOW!!! Anyways... I am now using exit(0) and it now terminates the program.

[Elysia]

Wow? Do you not get any error messages, or do you not see them?

[Nezmin2]

Wow? Do you not get any error messages, or do you not see them?

Elysia,
The only warnings that I am recieving is the Microsoft scanf_s () message which according to my instructor and some research that I did on the web is only for security purposes.

Can you point out to me what you are seeing? As I have stated earlier, I am a student and I love constructive criticism, as long as it's respectful.

[swgh]

Exit needs a value to what I understand, I never use it much.

exit(0);

I think it is under stdlib.h

[Nezmin2]

Exit needs a value to what I understand, I never use it much.

exit(0);

I think it is under stdlib.h

Thank you sw...

[Elysia]

Elysia,
The only warnings that I am recieving is the Microsoft scanf_s () message which according to my instructor and some research that I did on the web is only for security purposes.

Can you point out to me what you are seeing? As I have stated earlier, I am a student and I love constructive criticism, as long as it's respectful.

It should spit out an error saying:
Error: not enough arguments for function exit, or similar.

The only time I can think it would not do that is if you call the function without using a proper prototype (ie, not included the required header), in which case it should give a waring about calling a function without a prototype.

Perhaps the warning level is not high enough. If you go to projects, C/C++, General and set Warnings to level 4, do you get warnings then?