Loop and Case statements

I have been working on a simple c program using miracle C as my compiler. I have been able to get to this point:

Code:

//// Brian Sirrine
//// POS 370

#include <stdio.h>
int main(void)
{
//// Define sales tax for locations
float DELMAR = .0725;
float ENCINITAS = .0750;
float LAJOLLA = .0775;


//// Define purchase price
float PURCHASE = 0.00;
//// Define a restart point
Start:
printf("***********************************************************************\n") ;
printf("            Kudler Fine Foods Purchase Price w/tax\n");
printf("***********************************************************************\n\n") ;
printf("Please type the purchase price and then press enter.\n\n");
scanf("%f", &PURCHASE);

//// Start of if statements
	if(PURCHASE<=0.0) 
	{
		printf("Please enter a number greater than Zero\n");
		//// This will redirect the program back to the Start:
		goto Start;
	}
	 else
	{
		////if (typeof(PURCHASE) == typeof(int))
		{
			//// Display to the user the tax calculations from all three locations

			printf("***********************************************************************\n") ;
			printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
			printf("Delmar's Tax   -----> +	$%.2f\n" , (DELMAR*PURCHASE) );
			printf("			=======\n") ;
			printf("Total With Tax ----->	$%.2f\n" , (DELMAR*PURCHASE)+PURCHASE );
			printf("***********************************************************************\n") ;
	
	
	
			printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
			printf("Encinita's Tax -----> +	$%.2f\n" , (ENCINITAS*PURCHASE) );
			printf("			=======\n") ;
			printf("Total With Tax ----->	$%.2f\n" , (ENCINITAS*PURCHASE)+PURCHASE );
			printf("***********************************************************************\n") ;
	

	
			printf("\n") ;
			printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
			printf("Lajolla's Tax  -----> +	$%.2f\n" , (LAJOLLA*PURCHASE) );
			printf("			=======\n") ;
			printf("Total With Tax ----->	$%.2f\n" , (LAJOLLA*PURCHASE)+PURCHASE );
			printf("***********************************************************************\n\n\n") ;
		}
	}

		printf("Press any key to quit") ;
		

getchar();
return 0 ;
}

However, now I am trying to get a loop with a case statement for a menu prompt and this is where I stumble. Here is the code so far:

Code:

//// Brian Sirrine
//// POS 370

#include <stdio.h>
int main(void)
{
//// Define sales tax for locations
float DELMAR = .0725;
float ENCINITAS = .0750;
float LAJOLLA = .0775;


//// Define purchase price
float PURCHASE = 0.00;
//// Define a restart point
Start:
printf("***********************************************************************\n") ;
printf("            Kudler Fine Foods Purchase Price w/tax\n");
printf("***********************************************************************\n\n") ;
printf("Please type the purchase price and then press enter.\n\n");
printf("Press Q to End Program \n\n") ;
scanf("%f", &PURCHASE);

//// Start of Do While statement
if	(PURCHASE <=0.0)
	{
	pintf("enter a number Greater than 0 \n") ;
	goto Start;
	}
		else 
		{
		if	(PURCHASE >=0)
	
		////if (typeof(PURCHASE) == typeof(int))
		{
		char menu;
		printf("A: --> Delmar \n") ;
		printf("B: --> Encinitas \n") ;
		printf("C: --> LAJOLLA \n") ;
		printf("Choose a location. A, B, or C? \n");
		scanf(" %c", &menu);
		menu = toupper(menu);
	
		/* case */
		switch (menu)
			{
				case 'A':	printf("You have selected A \n");
						printf("***********************************************************************\n") ;
						printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
						printf("Delmar's Tax   -----> +	$%.2f\n" , (DELMAR*PURCHASE) );
						printf("			=======\n") ;
						printf("Total With Tax ----->	$%.2f\n" , (DELMAR*PURCHASE)+PURCHASE );
						printf("***********************************************************************\n") ;
				break;
				case 'B': 	printf("You have selected B \n");
						printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
						printf("Encinita's Tax -----> +	$%.2f\n" , (ENCINITAS*PURCHASE) );
						printf("			=======\n") ;
						printf("Total With Tax ----->	$%.2f\n" , (ENCINITAS*PURCHASE)+PURCHASE );
						printf("***********************************************************************\n") ;
				break;
				case 'C': 	printf("You have selected C \n");
						printf("\n") ;
						printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
						printf("Lajolla's Tax  -----> +	$%.2f\n" , (LAJOLLA*PURCHASE) );
						printf("			=======\n") ;
						printf("Total With Tax ----->	$%.2f\n" , (LAJOLLA*PURCHASE)+PURCHASE );
						printf("***********************************************************************\n\n\n") ;
				break;
				default: Printf("Invalid selection \n");
			}
			/* end case */
		}
	}
			}
	 else

		printf("Press any key to quit") ;
		

getchar();
return 0 ;
}

I cant figure out where I am messing up. Any help would be great. Thanks

Typing

Code:

//// Start of Do While statement

does not actually insert a do while statement into your program.

Attack of the University of Phoenix assignments!

Code:

else 
		{
		if	(PURCHASE >=0)
...
}

You probably want an "else if" there. And you have an extra close brace "}" also.

Ok, figured it out. This is where I stand, but I can use a few suggestions for what I would like to do.

I would like to have it loop back to the prompt for a price, however quit if you enter Q. If a letter is entered for the price, you get a nasty loop.
How can I avoid the two goto statements that I have?

This the code to point.

Code:

//// Brian Sirrine
//// POS 370

#include <stdio.h>
int main(void)
{
//// Define sales tax for locations
float DELMAR = .0725;
float ENCINITAS = .0750;
float LAJOLLA = .0775;


//// Define purchase price
float PURCHASE = 0.00;
//// Define a restart point
Start:
printf("***********************************************************************\n") ;
printf("            Kudler Fine Foods Purchase Price w/tax\n");
printf("***********************************************************************\n\n") ;
printf("Please type the purchase price and then press enter.\n\n");
printf("Press Q to End Program \n\n") ;
scanf("%f", &PURCHASE);

//// Start of Do While statement
	while	(PURCHASE <=0.00)
	{
	printf("enter a number Greater than 0 \n") ;
	goto Start;

	}
	////while	(PURCHASE >0.00)
		////{
		Prompt:
		{
		char (menu);
		printf("A: --> Delmar \n") ;
		printf("B: --> Encinitas \n") ;
		printf("C: --> LAJOLLA \n") ;
		printf("Choose a location. A, B, or C? \n");
		scanf(" %c", &menu);
		menu = toupper(menu);
	
		/* case */
		switch (menu)
			{
				case 'A':	printf("You have selected A \n");
						printf("***********************************************************************\n") ;
						printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
						printf("Delmar's Tax   -----> +	$%.2f\n" , (DELMAR*PURCHASE) );
						printf("			=======\n") ;
						printf("Total With Tax ----->	$%.2f\n" , (DELMAR*PURCHASE)+PURCHASE );
						printf("***********************************************************************\n") ;
				break;
				case 'B': 	printf("You have selected B \n");
						printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
						printf("Encinita's Tax -----> +	$%.2f\n" , (ENCINITAS*PURCHASE) );
						printf("			=======\n") ;
						printf("Total With Tax ----->	$%.2f\n" , (ENCINITAS*PURCHASE)+PURCHASE );
						printf("***********************************************************************\n") ;
				break;
				case 'C': 	printf("You have selected C \n");
						printf("\n") ;
						printf("Purchase Price ----->	$%.2f\n" , (PURCHASE) ); 
						printf("Lajolla's Tax  -----> +	$%.2f\n" , (LAJOLLA*PURCHASE) );
						printf("			=======\n") ;
						printf("Total With Tax ----->	$%.2f\n" , (LAJOLLA*PURCHASE)+PURCHASE );
						printf("***********************************************************************\n\n\n") ;
				break;
				default: printf("Invalid selection \n");
				goto Prompt;
			}
			/* end case */
			getchar();
		}
	////}

		printf("Press any key to quit") ;
	

getchar();
return 0 ;
}

Thanks everyone.

Code:

//// Define purchase price
float PURCHASE = 0.00;
//// Define a restart point
Start:
printf("***********************************************************************\n") ;
printf("            Kudler Fine Foods Purchase Price w/tax\n");
printf("***********************************************************************\n\n") ;
printf("Please type the purchase price and then press enter.\n\n");
printf("Press Q to End Program \n\n") ;
scanf("%f", &PURCHASE);

//// Start of Do While statement
	while	(PURCHASE <=0.00)
	{
	printf("enter a number Greater than 0 \n") ;
	goto Start;

	}

Why are you using while AND goto here? If you MUST use goto, use an if to make the printf conditional.

I personally would put a do-while around the whole block above, and make that loop end if the purchase is > 0.0f (you still need an if-statement), and remove the goto and label.

--
Mats

What you do from here is get rid of all gotos and start learning loops and upgrade your compiler to a better, more standards compliant one.
Oh and if you're using void main, don't! Use int main.