第二章 

程式清單2.1 myfirst.cpp

//myfirst.cpp -- displays a message

#include<iostream>
int main()
{
	using namespace std;
	cout << "Come up and C++ me some time.";
	cout << endl;
	cout << "You won't regret it!" << endl;
	cin.get();
	return 0;
	
}

#include<iostream>
int main()
{
	using namespace std;
	int carrots;//
	carrots = 25;
	cout << "I hava ";
	cout << carrots;
	cout << " carrots.";
	cout << endl;
	carrots = carrots - 1;
	cout << "Crunch,crunch.Now I have " << carrots << " carrots." << endl;
	cin.get();
		return 0;
}
 

程式清單2.3 getinfo.cpp

#include<iostream>
int main()
{
	using namespace std;
	int carrots;
	cout << "How many carrots do you have ?" << endl;
	cin >> carrots;
	cout << "Here are two more. ";
	carrots = carrots + 2;
	cout << "Now you have  " << carrots << " carrots." << endl;
	cin.get();
	cin.get();
	return 0;
}
 

程式清單2.4 sqrt.cpp

#include<iostream>
#include<cmath>


int main()
{
	using namespace std;
	double area;

	cout << "Enter the floor area,in square feet,of your home: ";
	cin >> area;
	double side;
	side = sqrt(area);
	cout << "That's the equivalent of a square " << side
		<< " feet to the side." << endl;
	cout << "How fascinating!" << endl;
	cin.get();
	cin.get();
	return 0;
}