我有一些C++代码可以在Visual Studio 2013中很好地编译,但不会在使用g ++(无IDE)的linux中编译。Linux上的代码编译失败,在Windows上成功:原因/修复?
什么是造成差异,我怎样才能使代码在Linux上编译?是否因为它们是不同的编译器?我需要特定的编译器设置吗?
代码:
#include <iostream>
typedef class IApp;
typedef class Component;
class Component
{
public:
protected:
IApp* app;
template<typename T>
void registerEvent()
{
app->logEvent();
}
};
class IApp : protected Component
{
public:
static IApp NULL_APP;
void logEvent()
{
printf("Event Logged\n");
}
protected:
virtual void foo() = 0;
};
int main(int argc, char** argv)
{
printf("Alive\n");
system("pause");
return 0;
}
在Windows上我没有得到任何编译器错误。在Linux上,我得到以下编译器错误:
g++ - o res main.cpp - std = c++11
main.cpp:3 : 15 : warning : ‘typedef’ was ignored in this declaration[enabled by default]
typedef class IApp;
^
main.cpp:4 : 15 : warning : ‘typedef’ was ignored in this declaration[enabled by default]
typedef class Component;
^
main.cpp: In member function ‘void Component::registerEvent()’ :
main.cpp : 16 : 6 : error : invalid use of incomplete type ‘class IApp’
app->logEvent();
^
main.cpp:3 : 15 : error : forward declaration of ‘class IApp’
typedef class IApp;
^
main.cpp: At global scope :
main.cpp : 23 : 14 : error : cannot declare variable ‘IApp::NULL_APP’ to be of abstract type ‘IApp’
static IApp NULL_APP;
^
main.cpp:20 : 7 : note : because the following virtual functions are pure within ‘IApp’ :
class IApp : protected Component
^
main.cpp : 31 : 15 : note : virtual void IApp::foo()
virtual void foo() = 0;
^
make: ***[all] Error 1