我对 C++ 的有限理解意味着我不知道如何正确执行以下操作:
#include "Platform.h"
#include "Global.h"
SDL_Surface *ms_pSmall (Global::sharedGlobal()->loadImage(RESOURCE_SMALL_PLATFORM) );
SDL_Surface *ms_pMedium(Global::sharedGlobal()->loadImage(RESOURCE_MEDIUM_PLATFORM));
SDL_Surface *ms_pLarge (Global::sharedGlobal()->loadImage(RESOURCE_LARGE_PLATFORM) );
//Initialise platform variables
Platform::Platform()
{
int imgSize = rand() % 3;
switch (imgSize)
{
case 2:
m_pImage = ms_pSmall;
break;
case 1:
m_pImage = ms_pMedium;
break;
case 0:
m_pImage = ms_pLarge;
break;
}
}
其中 ms_pSmall 等是静态指针,而 Global 是具有以下函数声明的单例:
static Global* sharedGlobal();
SDL_Surface* loadImage(const std::string& filename) const;
代码似乎编译正确,但链接器抱怨:
Undefined symbols for architecture i386:"Platform::ms_pMedium", referenced from:
Platform::Platform() in Platform.o "Platform::ms_pLarge", referenced from:
Platform::Platform() in Platform.o "Platform::ms_pSmall", referenced from:
Platform::Platform() in Platform.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
[抱歉缩进不佳。]
在这里的任何帮助将不胜感激,我会很高兴地展示更多代码,但我认为这就是有人需要了解我正在尝试做的事情。
提前致谢!