Thread: Need help with array calculation

Yeah well that error does make sense to me.

Try this:

Code:

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

int main(void)
{
  //Set store tax variables
  float StoreTax1;
  //Declare ProductPrice array
  float ProductPrice[] = {4.25, 3.00, 1.25, 5.50, 2.50, 7.00, 8.00, 9.00, 8.50, 11.00};
  float *Store1TaxPerItem;
  float Store1;
  int x = 0;

  StoreTax1 = 0.0725f;
  Store1TaxPerItem = malloc(sizeof(ProductPrice));
  Store1 = 0.0f;

  if(!Store1TaxPerItem)
  {
    fputs("Uh oh, spighetti-o! Out of memory! Please go purchase more.\n", stderr);
    return EXIT_FAILURE;
  }

  printf("Begin process");

  for (x = 0; x < sizeof(ProductPrice)/sizeof(*ProductPrice); x++ )
  {		
    Store1TaxPerItem[x] = ProductPrice[x] * StoreTax1;
    printf("The result Store1TaxPerItem &#37;f\n", Store1TaxPerItem[x]);

    Store1 = Store1 + Store1TaxPerItem[x];
  }
  printf("The result is %f\n", Store1);
  return EXIT_SUCCESS;
}

FYI, you have to declare all variables at the beginning of a code block in C. That is why the compiler error "made sense to me."

Originally Posted by master5001

FYI, you have to declare all variables at the beginning of a code block in C. That is why the compiler error "made sense to me."

So C is not as forgiving as VB in terms of where you declare your variables. I'll keep this in mind.

I have a new error .

Code:

line 18: ! only for int

I removed the exclamation point and rebuilt it and it ran. However like before I did not get my results shown.

Thanks for your patience.

! only for int? I don't think I've ever seen that message, and I'm pretty sure that that's not conforming -- the C standard says that ! applies to scalar types, and that includes all arithmetic types and all pointer types. Maybe the compiler is trying to save you from yourself; what compiler are you using?

Anyway the equivalent would be if(Store1TaxPerItem!=NULL).

Originally Posted by tabstop

! only for int? I don't think I've ever seen that message, and I'm pretty sure that that's not conforming -- the C standard says that ! applies to scalar types, and that includes all arithmetic types and all pointer types. Maybe the compiler is trying to save you from yourself; what compiler are you using?

Anyway the equivalent would be if(Store1TaxPerItem!=NULL).

I'm using the miracle C compiler.

Originally Posted by magiccity77

I'm using the miracle C compiler.

Miracle C was the result of a student's homework assignment. You'll want to find a more Standard's compliant compiler. You can find good, free replacements here.

Originally Posted by citizen

Miracle C was the result of a student's homework assignment. You'll want to find a more Standard's compliant compiler. You can find good, free replacements here.

Thanks I'll this link.