建构函式的暗示implicit转型.PPTVIP

* 指標與類別：例 (1/2) #include iostream #include string using namespace std; class Kitty { private: char breed[40], name[40]; int cost; public: Kitty(); void PutBreed(char b[]){ strcpy(breed,b); } void PutName(char n[]) { strcpy(name,n); } void PutCost(int c) { cost = c; } void PrintCatInfo(); }; Kitty::Kitty() //constructor { strcpy(breed,unknown); strcpy(name, not named yet); cost = 0; } void Kitty::PrintCatInfo() { cout \n Breed breed \n Name name; cout \n Cost $ cost; } void FillCatInfo(Kitty *); // protoype, input is an address to a Kitty * 指標與類別：例 (2/2) int main() { Kitty meow; cout \n Hair Ball Program \n\n Before the function call:\n; meow.PrintCatInfo(); FillCatInfo(meow); cout \n\n After the function call:\n; meow.PrintCatInfo(); cout \n\n No more kitties for you. \n ; return 0; } void FillCatInfo(Kitty * pCat) //pointer { char catname[40] = Thomas, catbreed[40] = Alley; int catcost = 3; pCat-PutBreed(catbreed); // public Kitty functions accessed w/ pointer pCat-PutName(catname); pCat-PutCost(catcost); } * * 指標與類別搭配應用：讀取機器時間 #include iostream #include time.h class Time { private: int hr, min, sec; public: Time(); //sets the time object to 0:0:1 void Reset(int h, int m, int s); void ShowTime(); }; Time::Time() { hr = min = 0; sec = 1; } void Time::Reset(int h, int m, int s) { hr = h; min = m; sec = s; } void Time::ShowTime() { cout \n Time object: hr : min : sec; } void SetTimeObject(Time *pWatch);//Function prototype, receives ptr to Time object * int main() { Time MyWatch; // create an object of class Time cout \n What time is it? \n\n; SetTimeObject(MyWatch); //pass the objects address to function MyWatch.ShowTime();// use the objects function to show the time cout \n\n OK Thanks! \n\n; r