#include <iostream> using namespace std; int main() { char newline = '\\n'; char tab = '\\t';

// #include<iostream> using namespace std; int main() { const float PI = 3.141;// 3.141 is floating point constant while PI is a constant float.

// #include <iostream> #include <iomanip> int main() { std::cout << "no setw:" << 42 << '\\n'

#include <iostream> using namespace std; class Time { private: int hours;// 0 to 23 int minutes;// 0 to 59

#include <iostream> using namespace std; class Distance { private: int feet;// 0 to infinite int inches;// 0 to 12

#include <iostream> using namespace std; const int SIZE = 10; class safearay { private: int arr[SIZE];

#include <iostream> #include <vector> using namespace std; // Consider an actual class. class Obj {

#include <iostream> using namespace std; const int MAX = 3; int main () { intvar[MAX] = {10, 100, 200};

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

#include <iostream> using namespace std; class Box { public: Box() { cout << "Constructor called!" <<endl;

#include <iostream> using namespace std; double division(int a, int b) { if( b == 0 ) { throw "Division by zero condition!";

#include <iostream> using namespace std; int main () { char greeting[6] = {'H', 'e', 'l', 'l', 'o', '\\0'};

#include <iostream> #include <cstring> using namespace std; int main () { char str1[10] = "Hello";

#include <iostream> using namespace std; int main () { intvar1; char var2[10]; cout << "Address of var1 variable: ";

#include <iostream> #include <ctime> using namespace std; int main() { // current date/time based on current system

#include <iostream> using namespace std; int sum(int a, int b = 20) { int result; result = a + b; return (result);

// ------------- #include <iostream> using namespace std; #define concat(a, b) a ## b int main() { int xy = 100;

// #include <iostream> using namespace std; int main () { cout << "Value of __LINE__ : " << __LINE__ << endl;