If the denominator to a division or modulo operation is zero, the behavior of the application is undefined.
Operator / is used for division and % for modulo operation. Division and modulo operations are susceptible to
divide-by-zero (and signed integer overflow) errors.
int foo(int a, int b) {
if (b == 0) {
a = 1;
}
return a / b; // Noncompliant: potential divide-by-zero error
}
What is the potential impact?
Integer division or remainder operations that result in divide-by-zero errors lead to undefined behavior.
For programs that exercise undefined behavior, the compiler is no longer bound by the language specification. The application may crash or, even
worse, the application may appear to execute correctly while losing data or producing incorrect results.
