Thread: Help please, simple program doesn't crunch numbers properly

I'm having trouble getting total to solve properly. Something seems to be messing up the value of price after it leaves the switch structure. Please forgive all the test code.

Code:

#include <stdio.h>

int main()
   {

   int sentinel = 0, product = 0, quantity;
   float total = 0, price = 0;


   while (sentinel != 1)
      {
      printf("Enter product number or 6 to exit: ");
      scanf("%d", &product);


      switch (product)
         {
         case 1:
            price = 2.98;
/* ---------Test code----------- */
            printf("price: %.2f\n", price);
            printf("product: %d\n", product);
/* ---------End of test-----------*/
            break;

         case 2:
            price = 4.50;
            break;

         case 3:
            price = 9.98;
            break;

         case 4:
            price = 4.49;
            break;

         case 5:
            price = 6.87;
            break;

         case 6:
            sentinel = 1;
            price = 0;
            break;

         default:
            printf("Enter 1 through 6 only\n");
            break;
         }

/* -----------test code------------------------------------------------ */
   printf("-----values after switch-----\n");
   printf("%price: .2f\n", price);
   printf("product: %d\n", product);
/* ----------------End of test ----------------------------------*/

   total = ( float ) quantity * price + total;      

   if (product >= 6)
      break;

/* Moved to bottom so you can exit without this interfering */

   printf("Enter quantity: ");
   scanf("%d", &quantity);

/* -----------------test code----------------- */
   printf("quantity: %d\n", quantity);
/* -----------------End of test--------------- */


      }

   printf("The total value is: %.2f\n", total);

/* -----------------test code----------------- */

   printf("quantity: %d", quantity);
   printf("\nprice: %.2f\n", price);

/* end of test code */

   return 0;
   }

It's been a while since I've last picked up my C book at least half a year or so. I'm thinking maybe it's something I've forgotten, but I could have sworn C doesn't use local and global variables.

Your test code has a little problem too - see if you can find it:

Code:

printf("%price: .2f\n", price);

~/

Thanks for the help!
Working flawlessly

I don't know how I could have even considered C to not have local and global, but I guess that's what happens when you don't practice for a long time.

I didn't realize kermit was asking a question.

But thank you very much, fixing that test error cleared up alot of conusion.