#include <iostream> using namespace std;class A {public:A( ) {cout << "A Constructor………" << endl;}~A( ) {cout << "A Destructor………" << endl;} };class B: public A {public:B( ) {cout << "B Constructor………" << endl;}~B( ) {cout << "B Destructor………" << endl;} };int main() {B b;return 0; }

#include <iostream> using namespace std;class A {public:A( ) {cout << "A Constructor………" << endl;}~A( ) {cout << "A Destructor………" << endl;} };class B {public:B( ) {cout << "B Constructor………" << endl;}~B( ) {cout << "B Destructor………" << endl;} };class C: public A, B { //構(gòu)造函數(shù)調(diào)用順序，先A后B，和書寫(繼承)順序相同public:C( ) {cout << "C Constructor………" << endl;}~C( ) {cout << "C Destructor………" << endl;} };int main() {C c;return 0; }

#include <iostream> using namespace std;class B1 {public:B1() {cout << "constructing B1 " << endl;} };class B2 {public:B2() {cout << "constructing B2 " << endl;} };class B3 {public:B3() {cout << "constructing B3 " << endl;} };class C {public:C(): memberB1(), memberB2(), memberB3() { }private://構(gòu)造函數(shù)的調(diào)用順序和對象的創(chuàng)建先后順序有關(guān)B2 memberB2;B1 memberB1;B3 memberB3; };int main() {C obj; // B2 B1 B3return 0; }

#include <iostream> using namespace std;class A {public:A() {cout << "A Constructor………" << endl;}~A() {cout << "A Destructor………" << endl;} };class B {public:B() {cout << "B Constructor………" << endl;}~B() {cout << "B Destructor………" << endl;} };class C: public A {private:B obj_b;public:C() {cout << "C Constructor………" << endl;}~C() {cout << "C Destructor………" << endl;} };int main() {C obj;return 0; }

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