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acos, asin

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Noncompliant Code Example

The following non-compliant noncompliant code computes the arc cosine of the variable x

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atan2(y, x)

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Noncompliant Code Example

The following non-compliant noncompliant code computes the arc tangent of the two variables x and y.

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double x;
double y;
double result;

/* Set the value for x and y */

if ( (x == 0.f) && (y == 0.f) ) {
     /* handle domain error */
}

result = atan2(y, x);

log, log10

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Noncompliant Code Example

The following non-compliant noncompliant code determines the natural logarithm of x.

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pow(x, y)

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Noncompliant Code Example

The following non-compliant noncompliant code raises x to the power of y.

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However, this code may produce a domain error if x is negative and y is not an integer, or if x is zero and y is zero. A domain error or range error may occur if x is zero and y is negative, and a range error may occur if the result cannot be represented as a double.

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Noncompliant Code Example

This code only performs bounds checking on x and y. It prevents domain errors and some range errors, but does not prevent range errors where the result cannot be represented as a double (see the Error Checking and Detection section below regarding ways to mitigate the effects of a range error).

double x;
double y;
double result;

if (((x == 0.f) && islessequal(y, 0)) ||
    (isless(x, 0))) {
  /* handle domain and range errors */
}

result = pow(x, y);

sqrt

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Noncompliant Code Example

The following non-compliant noncompliant code determines the square root of x

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