《C++ primer》第五版练习7.32 报错：“error C2797: 'Window_mgr::screens': 未执行成员初始值列表内的列表初始化或非静态数据成员初始值”

最新推荐文章于 2022-05-29 11:17:13 发布

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最新推荐文章于 2022-05-29 11:17:13 发布 · 2.6k 阅读

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#C++ #C++ Primer #VS2013

练习7.32代码

#include<iostream>
#include<string>
#include<vector>
using namespace std;
class Screen;
class Window_mgr;
class Screen{
public:
	friend class Window_mgr;
	typedef string::size_type pos;
	//构造函数
	Screen() = default;
	Screen(pos h, pos w) :height(h), width(w), contents(5, ' '){}
	Screen(pos h, pos w, char c) :height(h), width(w), contents(h*w, c){}
	//成员函数
	Screen &move(pos r, pos c);
	char get() const { return contents[cursor]; }
	char get(pos ht, pos wd) const;
	Screen &set(char);
	Screen &set(pos, pos, char);
	Screen &display(ostream &os)
	{
		do_display(os); return *this;
	}
	const Screen &display(ostream &os) const
	{
		do_display(os); return *this;
	}
private:
	pos cursor = 0;
	pos height = 0, width = 0;
	string contents;
	void do_display(ostream &os) const { os << contents; }
};

Screen& Screen::move(pos r, pos c){
	pos row = r*width;
	cursor = row + c;
	return *this;
}

inline ch