[問題] 請問可在calcModNum.h中include util嗎

[photonzero (邪心魔佛)]

如題
我發現只有在.cpp中有include
而.h沒有
錯誤訊息如下
In file included from test.cpp:10:
../../include/calcModNum.h: In static member function ‘static bool ModNum::getStrVal(const std::string&, ModNum&)’:
../../include/calcModNum.h:87: error: ‘isValidVarName’ was not declared in this scope
../../include/calcModNum.h:88: error: ‘myStr2Int’ was not declared in this scope

還是能在.cpp檔設定getStrVal？

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