Error: isEqual

[yanminhui]

CaptainBlackboard/D#0050-C++中浮点值做比较的正确方法/code/main.cpp

Lines 6 to 9 in 39c0078

	bool isEqual(const double first, const double second, const double epsilon = 1e-6)
	{
	return abs(first - second) < epsilon;
	}

cppinsights:

bool isEqual(const double first, const double second, const double epsilon)
{
  return static_cast<double>(abs(static_cast<int>(first - second))) < epsilon;
}

first-second 转换为 int 已经失去精确度。

Example: https://compiler-explorer.com/z/TPrcsGbEE