Floating Point Exception error

In my code

Code:

---

#include <stdio.h>
#include <math.h>

#define MAX 10000000000LL

int main(int argc, char * argv[]) {
    int i=0;
    long long barcode=0;
    int digits[10];
   
    printf("Please enter product code :\n");
    scanf("%lld", &barcode);
   
    for (i=10; i>0; i--) {
        digits[i] = (barcode/(10^i)) % 10;
        printf("digits[%lld] = %d\n", i, digits[i]);
    }

    return 0;
}

---

I keep getting "floating point exception". What's happening exactly?

Perhaps you're mistaking that ^ means "raise to power of".
It doesn't - it is bitwise exclusive or.

Some "10^i" is going to be zero I would guess, and that leads to a big black hole of division by zero.

Oh I just assumed since ^ stands for the exponent in pretty much everywhere else... then maybe it would be here too. I'm so naive ;)

A quick little google search finds that pow(x) is what I'm looking for. Thanks Salem.

Ok it looks like I'm not going to get away with it that easily,

I've replaced 10^i with pow (10, i) but I'm still out of luck, I keep getting the error message

Quote:

---

checksum.c: In function ‘main’:
checksum.c:20:44: error: invalid operands to binary % (have ‘double’ and ‘int’)

---

The more usual way (and more accurate) is


digits[i] = (barcode/divisor) % 10;
divisor /= 10;

Where divisor starts of at say 10000000000 and progressively reduces by a power of 10 each time around the loop.

Oh yeah that's a much better way. I can throw out the math library now :)