Neither 0.1d, 0.2d or 0.3d can be represented exactly in binary.Neither 0.1d, 0.2d or 0.3d can be represented e
阅读背景：
我知道0.1D+0.2D= 0.30000000000000004D -为什么0.1D+0.1D= 0.2D?
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