Thursday, June 6, 2019
c++ - How to compare float or double?
Answer
Answer
Is there built-in library can compare float or double
I do not think compare like a == b or a !=b makes any sense. Any suggestion?
Answer
the technique to compare floats or doubles is to use fabs
bool isEqual(const float a,const float b)
{
return fabs(a - b) < std::numeric_limits::epsilon();
}
You can use epsilon for the floats or doubles from std::numeric_limits
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