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sumanth232/compare double.cpp

Created July 8, 2013 11:03
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Comparing double variables considering the the very important precision
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compare double.cpp
//When I need to compare double values, I just make a function:
int CompareDouble(double a, double b)
{
if(a < b - EPS)
return -1;
if(a > b + EPS)
return 1;
return 0;
}
//So, instead of (a <= b), I use (CompareDouble(a, b) <= 0).
// Another better insight
/* The rule of thumb is: if the difference is less than EPS, the values are equal.
So, if your formula contains "a < b" (less), then you write "a < b - EPS". And if it contains "a <= b" (less or equal), then you write "a < b + EPS". */
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http://apps.topcoder.com/forums/?module=Thread&threadID=507829&mc=8#516283

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