[問題] 如何判定二數是否幾乎相等已回收
最近在解一個問題時發現
假設a=1.000000000000000e-010
b=1.00000000000000000000123e-10
如果我直接a-b會為0
但我希望我的精確度可以更高
像是到1e-60
有爬文可用digits改變精確度
及使用vpa來算
但出來的答案仍然為0
請問我應該如何做才能得知這二個數是否為相等(接近相等,可能精確度到 1e-60)
謝謝
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