我在网上找到了一个 arraylist 类，地址是 http://code.google.com/p/arraylist/downloads/detail?name=arraylist-v1.zip .
在使用 MS Visual C++ 的 Windows 上，它编译得很好，在带有 GCC 的 OS X 下，我遇到了很多错误。这是错误输出:
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-MacOSX/consolerpg
mkdir -p build/Debug/GNU-MacOSX
rm -f build/Debug/GNU-MacOSX/arraylist.operators.o.d
g++ -fpermissive -c -g -MMD -MP -MF build/Debug/GNU-MacOSX/arraylist.operators.o.d -o build/Debug/GNU-MacOSX/arraylist.operators.o arraylist.operators.cpp
arraylist.operators.cpp:86: error: redefinition of 'datatype& arraylist<datatype>::operator[](int)'
arraylist.operators.cpp:86: error: 'datatype& arraylist<datatype>::operator[](int)' previously declared here
arraylist.operators.cpp:100: error: redefinition of 'const datatype& arraylist<datatype>::operator[](int) const'
arraylist.operators.cpp:100: error: 'const datatype& arraylist<datatype>::operator[](int) const' previously declared here
arraylist.operators.cpp:128: error: redefinition of 'const arraylist<datatype>& arraylist<datatype>::operator=(const arraylist<datatype>&)'
arraylist.operators.cpp:128: error: 'const arraylist<datatype>& arraylist<datatype>::operator=(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:157: error: redefinition of 'arraylist<datatype> arraylist<datatype>::operator+(const arraylist<datatype>&)'
arraylist.operators.cpp:157: error: 'arraylist<datatype> arraylist<datatype>::operator+(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:186: error: redefinition of 'const arraylist<datatype>& arraylist<datatype>::operator+=(const arraylist<datatype>&)'
arraylist.operators.cpp:186: error: 'const arraylist<datatype>& arraylist<datatype>::operator+=(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:201: error: redefinition of 'arraylist<datatype> arraylist<datatype>::operator-(const datatype&)'
arraylist.operators.cpp:201: error: 'arraylist<datatype> arraylist<datatype>::operator-(const datatype&)' previously declared here
arraylist.operators.cpp:223: error: redefinition of 'const arraylist<datatype>& arraylist<datatype>::operator-=(const datatype&)'
arraylist.operators.cpp:223: error: 'const arraylist<datatype>& arraylist<datatype>::operator-=(const datatype&)' previously declared here
arraylist.operators.cpp:256: error: redefinition of 'arraylist<datatype> arraylist<datatype>::operator*(const int&)'
arraylist.operators.cpp:256: error: 'arraylist<datatype> arraylist<datatype>::operator*(const int&)' previously declared here
arraylist.operators.cpp:280: error: redefinition of 'const arraylist<datatype>& arraylist<datatype>::operator*=(const int&)'
arraylist.operators.cpp:280: error: 'const arraylist<datatype>& arraylist<datatype>::operator*=(const int&)' previously declared here
arraylist.operators.cpp:322: error: redefinition of 'arraylist<datatype> arraylist<datatype>::operator/(const int&)'
arraylist.operators.cpp:322: error: 'arraylist<datatype> arraylist<datatype>::operator/(const int&)' previously declared here
arraylist.operators.cpp:347: error: redefinition of 'const arraylist<datatype>& arraylist<datatype>::operator/=(const int&)'
arraylist.operators.cpp:347: error: 'const arraylist<datatype>& arraylist<datatype>::operator/=(const int&)' previously declared here
arraylist.operators.cpp:367: error: redefinition of 'bool arraylist<datatype>::operator==(const arraylist<datatype>&)'
arraylist.operators.cpp:367: error: 'bool arraylist<datatype>::operator==(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:394: error: redefinition of 'bool arraylist<datatype>::operator!=(const arraylist<datatype>&)'
arraylist.operators.cpp:394: error: 'bool arraylist<datatype>::operator!=(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:418: error: redefinition of 'bool arraylist<datatype>::operator>(const arraylist<datatype>&)'
arraylist.operators.cpp:418: error: 'bool arraylist<datatype>::operator>(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:425: error: redefinition of 'bool arraylist<datatype>::operator<(const arraylist<datatype>&)'
arraylist.operators.cpp:425: error: 'bool arraylist<datatype>::operator<(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:432: error: redefinition of 'bool arraylist<datatype>::operator>=(const arraylist<datatype>&)'
arraylist.operators.cpp:432: error: 'bool arraylist<datatype>::operator>=(const arraylist<datatype>&)' previously declared here
arraylist.operators.cpp:438: error: redefinition of 'bool arraylist<datatype>::operator<=(const arraylist<datatype>&)'
arraylist.operators.cpp:438: error: 'bool arraylist<datatype>::operator<=(const arraylist<datatype>&)' previously declared here
make[2]: *** [build/Debug/GNU-MacOSX/arraylist.operators.o] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 427ms)
是否有某种 VC++ 兼容性标志，甚至更好，您能否提供一个样本更正，以便我可以全部更正？
谢谢!
伊万
最佳答案
我的猜测是您正在编译 cpp 文件，即使 arraylist.h 包含它们。让我们看一下代码……
// arraylist.operators.cpp
#ifndef __arraylist_CLASS__
#include "arraylist.h"
#endif
然后我们有
// arraylist.h
#include "arraylist.cpp"
#include "arraylist.operators.cpp"
因此，如果您编译 arraylist.operators.cpp，它会包含 arraylist.h，其中包含 arraylist.operators.cpp ...
这个类看起来像一坨屎，就用std::vector吧。
关于c++ - ArrayList C++问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4126094/