#include iostream#include vectorusing namespace std;// Consider an actual class.class Obj {

#include iostreamusing namespace std;int main () {// Local variable declaration:int x, y = 10;

#include iostreamusing namespace std;const int SIZE = 10;class safearay {private:int arr[SIZE];

#include iostreamusing namespace std;class Distance {private:int feet;// 0 to infiniteint inches;// 0 to 12

// #include iostream#include iomanipint main() {std::cout no setw: 42 \\n

// #includeiostreamusing namespace std;int main() {const float PI = 3.141;// 3.141 is floating point constant while PI is a constant float.

#include iostreamusing namespace std;// Base classclass Shape {public:// pure virtual function providing interface framework.

#include iostreamusing namespace std;class Adder {public:// constructorAdder(int i = 0) {total = i;

#include iostreamusing namespace std;class Adder {public:// constructorAdder(int i = 0) {total = i;

#include fstream#include iostreamusing namespace std;int main () {char data[100];// open a file in write mode.

#include iostreamusing namespace std;double division(int a, int b) {if( b == 0 ) {throw Division by zero condition!;

#include iostream#include exceptionusing namespace std;struct MyException : public exception {

// #include iostreamusing namespace std;#define PI 3.14159int main () {cout Value of PI : PI endl;

#include iostreamusing namespace std;#define MIN(a,b) (((a)(b)) ? a : b)int main () {int i, j;

#include iostreamusing namespace std;#define DEBUG#define MIN(a,b) (((a)(b)) ? a : b)int main () {

#include iostreamusing namespace std;class Box {public:Box() { cout Constructor called! endl;

#include iostream#include vector#include cstdlib#include string#include stdexcept

#include iostream#include stringusing namespace std;template typename Tinline T const Max (T const a, T const b) {

// C++ std命名空间#include iostreamusing std::cout;int main () {cout std::endl is used with std! std::endl;

#include iostreamusing namespace std;// first name spacenamespace first_space {void func() {cout Inside first_space endl;