对于给定的类构造函数和析构函数,我收到一个非常奇怪的错误.请帮我解决这个问题.
架构i386的未定义符号：
"vtable for A",referenced from:
A::A() in A.o
A::~MissionController() in A.o
NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture i386
clang: error: linker command Failed with exit code 1 (use -v to see invocation)
代码片段
.h文件：
class A: public B
public:
A();
~A();
};
.cpp文件..
A::A()
{
}
A::~A()
{
}
