Dev-C++編譯錯誤：no type named ‘iterator_category’ in ‘struct snode’

最近刷題總出現一些奇怪的問題，決定開始寫blog記錄一下~ 錯誤：no type named ‘iterator_category’ in ‘struct snode’ 錯誤代碼： struct snode { double x; double y; }; double distance(snode n1, snode n2) { return sqrt(pow(n1.x-n2.x,2.0)+po

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