diff options
| -rw-r--r-- | 7p31.cpp | 25 | ||||
| -rw-r--r-- | 7p32.cpp | 11 | ||||
| -rw-r--r-- | 7p33.cpp | 20 | ||||
| -rw-r--r-- | screen.hpp | 108 |
4 files changed, 127 insertions, 37 deletions
diff --git a/7p31.cpp b/7p31.cpp new file mode 100644 index 0000000..0be5a2f --- /dev/null +++ b/7p31.cpp @@ -0,0 +1,25 @@ + +/* + * + * 7.31 + * + * + */ + +class myY; + +class myX { +public: + myY *Yptr; +}; + +class myY { +public: + myX Xob; +}; + +int main () { + + + return 0; +} diff --git a/7p32.cpp b/7p32.cpp new file mode 100644 index 0000000..2737423 --- /dev/null +++ b/7p32.cpp @@ -0,0 +1,11 @@ + +/* + * + * 7.32 + * + * Done in screen.hpp + */ + +int main () { + return 0; +} diff --git a/7p33.cpp b/7p33.cpp new file mode 100644 index 0000000..d771764 --- /dev/null +++ b/7p33.cpp @@ -0,0 +1,20 @@ + +/* + * + * 7.33 + * + * + */ + +int main () { + + /* Fixed version + + Screen::pos Screen::size() const + { + return height * width; + } + + */ + return 0; +} @@ -1,62 +1,96 @@ #ifndef SCREEN_H #define SCREEN_H + #include <string> +#include <vector> #include <iostream> +class Screen; + +class Window_mgr { +public: + using screen_index = std::vector<Screen>::size_type; // size type + void clear(screen_index); // clear screen + Window_mgr(); // + +private: + std::vector<Screen> screens; // private data member +}; + class Screen { + friend void Window_mgr::clear(screen_index); // Tell screen class we have a friend function from Window_mgr + public: - typedef std::string::size_type Pos; + using pos = std::string::size_type; // pos type + using content_type = char; // content type Screen() = default; - Screen(Pos ht, Pos wd): Height(ht), Width(wd), Contents(ht * wd, ' ') { } - Screen(Pos ht, Pos wd, char c): Height(ht), Width(wd), Contents(ht * wd, c) { } - char get() const { return Contents[Cursor]; } - inline char get(Pos ht, Pos wd) const; - Screen &move(Pos r, Pos c); - inline Screen &set(char c); - inline Screen &set(Pos r, Pos col, char ch); - Screen &display(std::ostream &os) { do_display(os); return *this; } - const Screen &display(std::ostream &os) const { do_display(os); return *this; } - void printheight(Pos Height); + Screen(pos ht, pos wd): height(ht), width(wd), contents(ht * wd, ' ') {} + Screen(pos ht, pos wd, content_type c): height(ht), width(wd), contents(ht * wd, c) {} + const content_type &get() const { return contents[cursor]; } + const content_type &get(pos row, pos col) const; + Screen &set(content_type c); + Screen &set(pos row, pos col, content_type c); + Screen &move(pos row, pos col); + const Screen &display(std::ostream &os) const; + Screen &display(std::ostream &os); + private: - void do_display(std::ostream &os) const {os << Contents;} - Pos Cursor = 0; - Pos Height = 0; - Pos Width = 0; - std::string Contents; + void do_display(std::ostream &os) const; + pos cursor = 0; + pos height = 0; + pos width = 0; + std::string contents; }; -inline Screen &Screen::set(char c) -{ - Contents[Cursor] = c; // set the new value at the current cursor location +inline +const Screen::content_type &Screen::get(pos row, pos col) const { + return contents[row * width + col]; +} + +inline +Screen &Screen::set(content_type c) { + contents[cursor] = c; return *this; - // return this object as an lvalue } -inline Screen &Screen::set(Pos r, Pos col, char ch) -{ - Contents[r*Width + col] = ch; // set specified location to given value +inline +Screen &Screen::set(pos row, pos col, content_type c) { + contents[row * width + col] = c; return *this; - // return this object as an lvalue } -inline Screen &Screen::move(Pos r, Pos c) -{ - Pos row = r * Width; // compute the row location - Cursor = row + c; - // move cursor to the column within that row +inline +Screen &Screen::move(pos row, pos col) { + cursor = row * width + col; return *this; - // return this object as an lvalue } -char Screen::get(Pos r, Pos c) const // declared as inline in the class -{ - Pos row = r * Width; - // compute row location - return Contents[row + c]; // return character at the given column +inline +const Screen &Screen::display(std::ostream &os) const { + do_display(os); + return *this; +} + +inline +Screen &Screen::display(std::ostream &os) { + do_display(os); + return *this; } -void printheight(Screen::Pos Height) { - std::cout << Height; +inline +void Screen::do_display(std::ostream &os) const { + for (pos i = 0; i != contents.size(); ++i) { + os << contents[i]; + if ((i + 1) % width == 0 && i + 1 != contents.size()) + os << "\n"; + } +} + +Window_mgr::Window_mgr() : screens{Screen(24, 80)} {} + +void Window_mgr::clear(screen_index i) { + Screen &s = screens[i]; + s.contents = std::string(s.height * s.width, ' '); } #endif |