如何解決這個問題？ C ++編譯器設置

Question

我通過xcode安裝了gcc，但是在嘗試編譯文件時遇到此錯誤：

 sanjay$ g++ main.cpp
Undefined symbols for architecture x86_64:
  "Fraction::Fraction(int, int)", referenced from:
      MathAssignTest()     in cck2LKpO.o
      BinaryMathTest()     in cck2LKpO.o
      RelationTest()     in cck2LKpO.o
      BasicTest()    in cck2LKpO.o
  "Fraction::operator/=(Fraction const&)", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator-=(Fraction const&)", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator*=(Fraction const&)", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator--(int)", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator--()", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator+=(Fraction const&)", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator++(int)", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "Fraction::operator++()", referenced from:
      MathAssignTest()     in cck2LKpO.o
  "operator/(Fraction const&, Fraction const&)", referenced from:
      BinaryMathTest()     in cck2LKpO.o
  "operator==(Fraction const&, Fraction const&)", referenced from:
      RelationTest()     in cck2LKpO.o
  "operator>=(Fraction const&, Fraction const&)", referenced from:
      RelationTest()     in cck2LKpO.o
  "operator>(Fraction const&, Fraction const&)", referenced from:
      RelationTest()     in cck2LKpO.o
  "operator<=(Fraction const&, Fraction const&)", referenced from:
      RelationTest()     in cck2LKpO.o
  "operator<<(std::basic_ostream<char, std::char_traits<char> >&, Fraction const&)", referenced from:
      MathAssignTest()     in cck2LKpO.o
      BinaryMathTest()     in cck2LKpO.o
      RelationTest()     in cck2LKpO.o
      BasicTest()    in cck2LKpO.o
  "operator<(Fraction const&, Fraction const&)", referenced from:
      RelationTest()     in cck2LKpO.o
  "operator-(Fraction const&, Fraction const&)", referenced from:
      BinaryMathTest()     in cck2LKpO.o
  "operator*(Fraction const&, Fraction const&)", referenced from:
      BinaryMathTest()     in cck2LKpO.o
  "operator!=(Fraction const&, Fraction const&)", referenced from:
      RelationTest()     in cck2LKpO.o
  "operator+(Fraction const&, Fraction const&)", referenced from:
      BinaryMathTest()     in cck2LKpO.o
  "operator>>(std::basic_istream<char, std::char_traits<char> >&, Fraction&)", referenced from:
      BasicTest()    in cck2LKpO.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

我該如何解決？ 我很確定我的g ++編譯器已正確設置，因為它適用於其他文件夾中的文件。 請幫我解決這個問題。.我是該語言的初學者，並盡我所能理解。

Answer 1

您需要將包含Fraction類的cpp文件添加到命令行。 像這樣

g++ main.cpp Fraction.cpp

希望能有所幫助。 :)