Advanced Search

Log In | Not a Member?

Contact ADC

< Previous PageNext Page > Hide TOC

Divide-By-Zero Operations

An integer divide-by-zero operation is fatal on an x86 system but the operation continues on a PowerPC system, where it returns zero. (A floating point divide-by-zero behaves the same on both architectures.) If you get a crash log that mentions EXC_I386_DIV (divide by zero), your program divided by zero. Mod operations perform a divide, so a mod-by-zero operation produces a divide-by-zero exception. To fix a divide-by-zero exception, find the place in your program corresponding to that operation. Then add code that checks for a denominator of zero before performing the divide operation.

For example, change this:

 int a = b % c;    // Divide by zero can happen here;

to this:

int a;

if (c != 0) {

     a = b % c;

 } else {

     a = 0;

}

< Previous PageNext Page > Hide TOC

Did this document help you? Yes: Tell us what works for you. It’s good, but: Report typos, inaccuracies, and so forth. It wasn’t helpful: Tell us what would have helped.

	Get information on Apple products. Visit the Apple Store online or at retail locations. 1-800-MY-APPLE Copyright © 2007 Apple Inc. All rights reserved. | Terms of use | Privacy Notice