程序段的Class Scope

如果class member的定义在class body之外, 那么从该定义的member名称开始出现到定义结束为止,都属于class scope,但是前边的返回类型不属于class scope。如:

typedef int Type;
Type initVal();

class Exercise
{
public:
    typedef double Type;
    Type setVal(Type);
    Type initVal(){return 0;};
private:
    int val;
};

Type/*此处的Type为全局里面定义的int*/ Exercise::setVal(Type parm)                //error: prototype for 'Type Exercise::setVal(double)' does not match any in class 'Exercise'

{                                                                                                                            //candidate is: double Exercise::setVal(double)|
    val = parm+initVal();

}


或者修改定义Type 为 Exerci::Type, 或者修改类里面的member声明的Type为::Type。

posted @ 2011-07-31 17:37  lidan  阅读(303)  评论(0编辑  收藏  举报