当函数的前向声明在源文件(.cpp)中可用时,为什么同样的方法不能用于类?
谢谢。
// main.cpp
void forwardDeclaredFunction() ; // This is correct
class One ; // Why this would be wrong
int One:: statVar = 10 ;
void
One :: anyAccess() {
std::cout << "\n statVar:\t " << statVar ;
std::cout << "\n classVar:\t" << classVar ;
}
class One {
public:
void anyAccess() ;
static int statVar ;
private:
int classVar ;
} ;
int main (int argc, char * const argv[]) {
One *obj = new One ;
return 0;
}
void forwardDeclaredFunction() {
}