Thread: help with a switch and a loop

I am writing this program fro a class and it will compile in bloodshed, but will not give me the total price that I am trying to get to. The steps are to pick a location, enter a purchase amount and it is suppose to give you the tax and total amounts, but it stops after the purchase amount is entered. Can anyone see my error?

Code:

#include <stdio.h>
#include <stdlib.h>

int main ()

{
//declare sales tax rates and initialize variables    
float purchase = 0.0;
float delmar_rate = 0.0725;
float encinitas_rate = 0.075;
float lajolla_rate = 0.0775;
float totaltax1= 0;
float totaltax2= 0;
float totaltax3 = 0;
float totalpurchase1 = 0;
float totalpurchase2 = 0;
float totalpurchase3 = 0;
int storelocation = 0;

//enter input items
printf("Kudler Fine Foods Sales Tax\n");
printf("\n Please Select:\n 1 - Del Mar\n 2 - Encinitas\n 3 - La Jolla\n");
printf("\nPlease select a store (1-3): ");
scanf("%d", &storelocation);
printf("\nEnter Purchase Total: $");
	do
	{
		scanf("%f",&purchase);
	
		//Display error message to user.
		if (purchase <= 0)
		{
			printf("Error: purchase must be greater than 0\n");
			printf("\nEnter Purchase Total: $");
		} //if PurchaseAmount <=0)
		
	} while (purchase <= 0);
			
	//Perform the Calculations.
totaltax1 = purchase * delmar_rate;
totaltax2 = purchase * encinitas_rate;
totaltax3 = purchase * lajolla_rate;
totalpurchase1 = totaltax1 + purchase;
totalpurchase2 = totaltax2 + purchase;
totalpurchase3 = totaltax3 + purchase;
	
//print tax amount and total sale
switch(storelocation){
case '1':  printf("\nDel Mar Sales Tax:  $%.2d\n", totaltax1);
printf("Del Mar Total Purchase:  $%.2d\n\n", totalpurchase1);
 
case '2':  printf("Encinitas Sales Tax:  $%.2d\n", totaltax2);  
printf("Encinitas Total Purchase:  $%.2d\n\n", totalpurchase2);
 
case '3':  printf("La Jolla Sales Tax:  $%.2d\n", totaltax3);
printf("La Jolla Total Purchase:  $%.2d\n\n", totalpurchase3);
}//end of switch


//used to keep console window open
system("Pause");
  
return 0;     

}//end of main function

Try an experiment: type 49 for the location and see what happens.

I typed 49 for the location and 45 for purchase and it gave me big negative numbers.

The problem is the that you have checked the storelocation values as a character .But it is a integer .

Code:

  #include <stdio.h>
#include <stdlib.h>

int main ()

{
//declare sales tax rates and initialize variables
float purchase = 0.0;
float delmar_rate = 0.0725;
float encinitas_rate = 0.075;
float lajolla_rate = 0.0775;
float totaltax1= 0;
float totaltax2= 0;
float totaltax3 = 0;
float totalpurchase1 = 0;
float totalpurchase2 = 0;
float totalpurchase3 = 0;
int storelocation = 0;

//enter input items
printf("Kudler Fine Foods Sales Tax\n");
printf("\n Please Select:\n 1 - Del Mar\n 2 - Encinitas\n 3 - La Jolla\n");
printf("\nPlease select a store (1-3): ");
scanf("%d", &storelocation);
printf("\nEnter Purchase Total: $");
        do
        {
                scanf("%f",&purchase);

                //Display error message to user.
                if (purchase <= 0)
                {
                        printf("Error: purchase must be greater than 0\n");
                        printf("\nEnter Purchase Total: $");
                } //if PurchaseAmount <=0)

        } while (purchase <= 0);

        printf("It is %f \n",purchase);
        //Perform the Calculations.
totaltax1 = purchase * delmar_rate;
totaltax2 = purchase * encinitas_rate;
totaltax3 = purchase * lajolla_rate;
totalpurchase1 = totaltax1 + purchase;
totalpurchase2 = totaltax2 + purchase;
totalpurchase3 = totaltax3 + purchase;

//print tax amount and total sale
switch(storelocation){
case 1:  printf("\nDel Mar Sales Tax:  $%.2d\n", totaltax1);
printf("Del Mar Total Purchase:  $%.2d\n\n", totalpurchase1);
break;
case 2:  printf("Encinitas Sales Tax:  $%.2d\n", totaltax2);
printf("Encinitas Total Purchase:  $%.2d\n\n", totalpurchase2);
break;
case 3:  printf("La Jolla Sales Tax:  $%.2d\n", totaltax3);
printf("La Jolla Total Purchase:  $%.2d\n\n", totalpurchase3);
default :
printf("Invalid\n");
break;
}//end of switch


//used to keep console window open
//system("Pause");

return 0;

}//end of main function

Use break and default in the switch statements.

The first code runs and gives me $0 for sales tax and total.

The second runs but closes after the purchase amount is put in.

Infact I commented the statement

Code:

  
system("Pause");

Just remove the comment in that statement .

remove that statement completely? I have always had to put that in to keep the window open in bloodshed.

You use the %.2f format specifier in printf inside the switch cases instead of %.2d.
Your code,

Code:

printf("\nDel Mar Sales Tax:  $%.2d\n", totaltax1);

Change it like the following.

Code:

printf("\nDel Mar Sales Tax:  $%.2f\n", totaltax1);

When you print the results you used %d .But the values are floating point values . So use %f.

Code:

#include <stdio.h>
#include <stdlib.h>

int main ()

{
//declare sales tax rates and initialize variables
float purchase = 0.0;
float delmar_rate = 0.0725;
float encinitas_rate = 0.075;
float lajolla_rate = 0.0775;
float totaltax1= 0;
float totaltax2= 0;
float totaltax3 = 0;
float totalpurchase1 = 0;
float totalpurchase2 = 0;
float totalpurchase3 = 0;
int storelocation = 0;

//enter input items
printf("Kudler Fine Foods Sales Tax\n");
printf("\n Please Select:\n 1 - Del Mar\n 2 - Encinitas\n 3 - La Jolla\n");
printf("\nPlease select a store (1-3): ");
scanf("%d", &storelocation);
printf("\nEnter Purchase Total: $");
        do
        {
                scanf("%f",&purchase);

                //Display error message to user.
                if (purchase <= 0.0)
                {
                        printf("Error: purchase must be greater than 0\n");
                        printf("\nEnter Purchase Total: $");
                } //if PurchaseAmount <=0)

        } while (purchase <= 0.0);

        //Perform the Calculations.
totaltax1 = purchase * delmar_rate;
totaltax2 = purchase * encinitas_rate;
totaltax3 = purchase * lajolla_rate;
totalpurchase1 = totaltax1 + purchase;
totalpurchase2 = totaltax2 + purchase;
totalpurchase3 = totaltax3 + purchase;

//print tax amount and total sale
switch(storelocation){
case 1:  printf("\nDel Mar Sales Tax:  $%.2f\n", totaltax1);
printf("Del Mar Total Purchase:  $%.2f\n\n", totalpurchase1);
break;
case 2:  printf("Encinitas Sales Tax:  $%.2f\n", totaltax2);
printf("Encinitas Total Purchase:  $%.2f\n\n", totalpurchase2);
break;
case 3:  printf("La Jolla Sales Tax:  $%.2f\n", totaltax3);
printf("La Jolla Total Purchase:  $%.2f\n\n", totalpurchase3);
default :
printf("Invalid\n");
break;
}//end of switch


//used to keep console window open
system("Pause");

return 0;

}//end of main function

That gives me an invalid option error after I put in the purchase amount.

What input you have given for the following,
Please select a store (1-3):
Here if you give the value which is not between 1-3 then it will give the error "Invalid option".

What is the input you gave for the option . Otherwise post the output you got.

Thanks to all who have tried to help with this. I am calling it a night and will check in the morning. Thanks again! I would love to get this figured out. Not just for the grade, but for my own learning.