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float calc_percentage(float value) {
  return (float)(value * 0.1f);
}

void float_routine(void) {
  float value = 99.0f;
  long double percentage;

  percentage = calc_percentage(value);
}

Forcing the range and precision inside the calcPercentage() function is a good way to fix the problem once without having to apply fixes in multiple locations (every time calcPercentage() is called).  

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Failure to follow this guideline can lead to inconsistent results across different platforms.

Automated Detection

Related Vulnerabilities

Search for vulnerabilities resulting from the violation of this rule on the CERT website.

Bibliography

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