05_Poly MP Grundgerüst Teil 1, Punkt 1
Signed-off-by: Johannes Theiner <j.theiner@live.de>
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@ -82,7 +82,20 @@ Rectangle::Rectangle(int x, int y, int width, int height) {
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}
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void Rectangle::draw() {
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int x_start = position.x - (width / 2);
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int x_stop = position.x + (width / 2);
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int y_start = position.y - (height / 2);
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int y_stop = position.y + (height / 2);
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for(int i = x_start; i <= x_stop; i++) {
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ansiConsole.printText(position.x, position.y - (height / 2), "#");
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ansiConsole.printText(position.x, position.y + (height / 2), "#");
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}
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for(int i = y_start; i< y_stop; i++) {
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ansiConsole.printText(position.x - (width / 2), position.y, "#");
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ansiConsole.printText(position.x - (width / 2), position.y, "#");
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}
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}
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int main(int argc, char **argv) {
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@ -103,11 +116,15 @@ int main(int argc, char **argv) {
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Point *p3 = new Point(30, 15);
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p3->draw();
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Rectangle *r = new Rectangle(20, 20, 20, 20);
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r->draw();
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delete p;
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delete p2;
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delete p3;
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delete c;
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delete r;
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return 0;
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}
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@ -1,281 +0,0 @@
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// file main_mp5_POLY.cpp
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#include <iostream>
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#include <vector>
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class Base {
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public:
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void overriddenMethod();
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void overriddenMethod(int);
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void overriddenMethod(std::string);
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void nonVirtualMethod(void);
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virtual void virtualMethod(void);
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/*
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virtual void virtualAndOverridden(void);
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virtual void virtualAndOverridden(int);
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virtual void virtualAndOverridden(std::string);*/
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};
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class Derived_1 : public Base {
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public:
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Derived_1();
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~Derived_1();
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void nonVirtualMethod(void);
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virtual void virtualMethod(void);
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/* virtual void virtualAndOverridden(void);
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virtual void virtualAndOverridden(int);
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virtual void virtualAndOverridden(std::string);*/
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};
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class Derived_2 : public Derived_1 {
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public:
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void nonVirtualMethod(void);
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virtual void virtualMethod(void);
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};
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// see https://isocpp.org/wiki/faq/strange-inheritance#calling-virtuals-from-ctors
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Derived_1::Derived_1(){
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virtualMethod(); // 6a
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}
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Derived_1::~Derived_1(){
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virtualMethod(); // 6b
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}
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// -------------------
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void Base::overriddenMethod(void){
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std::cout << "Base::overriddenMethod(void)" << std::endl;
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}
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void Base::overriddenMethod(int){
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std::cout << "Base::overriddenMethod(int)" << std::endl;
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}
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void Base::overriddenMethod(std::string){
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std::cout << "Base::overriddenMethod(std::string)" << std::endl;
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}
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void Base::nonVirtualMethod(void){
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std::cout << "Base::nonVirtualMethod(void)" << std::endl;
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}
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void Base::virtualMethod(void){
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std::cout << "Base::virtualMethod" << std::endl;
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}
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/*
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void Base::virtualAndOverridden(void){
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std::cout << "Base::virtualAndOverridden(void)" << std::endl;
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}
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void Base::virtualAndOverridden(int){
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std::cout << "Base::virtualAndOverridden(int)" << std::endl;
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}
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void Base::virtualAndOverridden(std::string){
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std::cout << "Base::virtualAndOverridden(std::string)" << std::endl;
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}
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*/
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// -------------------
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void Derived_1::nonVirtualMethod(void){
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std::cout << "Derived_1::nonVirtualMethod" << std::endl;
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}
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void Derived_1::virtualMethod(void){
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std::cout << "Derived_1::virtualMethod" << std::endl;
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}
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/*
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void Derived_1::virtualAndOverridden(void){
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std::cout << "Derived_1::virtualAndOverridden(void)" << std::endl;
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}
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void Derived_1::virtualAndOverridden(int){
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std::cout << "Derived_1::virtualAndOverridden(int)" << std::endl;
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}
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void Derived_1::virtualAndOverridden(std::string){
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std::cout << "Derived_1::virtualAndOverridden(std::string)" << std::endl;
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}
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*/
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// -------------------
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void Derived_2::nonVirtualMethod(void){
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std::cout << "Derived_2::nonVirtualMethod" << std::endl;
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}
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void Derived_2::virtualMethod(void){
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std::cout << "Derived_2::virtualMethod" << std::endl;
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}
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/*
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illustrates binding of method invocations
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compile time vs. run time binding
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*/
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void foobar(){
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std::cout << "6a) ";
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Derived_2* pR = new Derived_2();
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Base* pBase = pR;
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Derived_1* pDerived_1 = pR;
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Derived_2* pDerived_2 = pR;
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std::cout << "1) ";
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pBase->virtualMethod(); // 1)
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std::cout << "2) ";
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pBase->nonVirtualMethod(); // 2)
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std::cout << "3) ";
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pDerived_2->virtualMethod(); // 3)
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std::cout << "4) ";
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pDerived_2->nonVirtualMethod(); // 4)
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std::cout << "5) ";
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static_cast<Base*>(pDerived_2)->nonVirtualMethod(); // 5)
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std::cout << "7) ";
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static_cast<Derived_1*>(pDerived_2)->nonVirtualMethod(); // 7)
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std::cout << "8) ";
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pDerived_1->nonVirtualMethod(); // 8)
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std::cout << "9) ";
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pDerived_1->virtualMethod(); // 9)
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std::cout << "10a) ";
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pBase->Base::virtualMethod(); // 10a)
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std::cout << "10b) ";
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pDerived_2->Derived_1::virtualMethod(); // 10b)
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std::cout << "11 ";
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pDerived_2->overriddenMethod(17); // 11)
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std::cout << "12 ";
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pDerived_2->overriddenMethod(); // 12)
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std::cout << "13 ";
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pDerived_2->overriddenMethod(std::string("x")); // 13)
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std::cout << "14 ";
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dynamic_cast<Derived_2*>(pBase)->virtualMethod(); // 14)
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std::cout << "15 ";
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Base* baseObject = new Base();
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Derived_2* d2Object = dynamic_cast<Derived_2*>(baseObject);
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if(d2Object){ // 15)
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std::cout << "+" << std::endl;
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}else{
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std::cout << "-" << std::endl;
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}
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/*
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std::cout << "16 ";
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pDerived_2->virtualAndOverridden(17); // 16)
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std::cout << "17 ";
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pDerived_2->virtualAndOverridden(); // 17)
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std::cout << "18 ";
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pDerived_2->virtualAndOverridden(std::string("x")); // 18)
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*/
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std::cout << "6b) ";
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delete pR;
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}
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/*
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void foo(){
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for(int i=0; i<LOOPS;i++){
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Base* ps = new Base();
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ps->nonVirtualMethod2();
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delete ps;
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}
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}
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void bar(int i){
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Base s;
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s.nonVirtualMethod2();
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if(i>0){
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bar(i-1);
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}
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}*/
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typedef void (*funcPointer_void_void)(void);
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void sing_gingle(void){
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std::cout << "gingle ";
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}
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void sing_bells(void){
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std::cout << "bells ";
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}
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void sing_surf(void){
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std::cout << "surf ";
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}
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void sing_safari(void){
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std::cout << "surfin safari ";
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}
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std::vector<funcPointer_void_void> songOfSeason(int currentTemperatureCelsius) {
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std::vector<funcPointer_void_void> result;
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if(currentTemperatureCelsius <= 0){
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result.push_back(sing_gingle);
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result.push_back(sing_bells);
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result.push_back(sing_gingle);
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result.push_back(sing_bells);
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}else{
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result.push_back(sing_surf);
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result.push_back(sing_surf);
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result.push_back(sing_safari);
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result.push_back(sing_surf);
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result.push_back(sing_surf);
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result.push_back(sing_safari);
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}
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return result;
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}
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void sing(int currentTemperatureCelsius){
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std::vector<funcPointer_void_void> song = songOfSeason(currentTemperatureCelsius);
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// traditional C-style for-loop
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for(int i=0; i<song.size(); ++i){
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song[i](); // invoke funtion (pointed to by function pointer at song[i])
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}
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std::cout << std::endl;
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// C++11 range-based for-loop looks better:
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for(auto func: song){
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func();
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}
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std::cout << std::endl;
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}
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int main(int argc, const char * argv[]) {
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foobar();
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sing(-17);
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/*
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std::cout << "foo " << std::endl;
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foo();
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std::cout << "bar " << std::endl;
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bar(LOOPS);
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*/
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return 0;
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}
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