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//C hello world example #include <stdio.h> int main() { printf("Hello world\n"); return 0; }
// File name: HelloWorld.cpp // Purpose: A simple C++ program which prints "Hello World!" on the screen #include <iostream> // need this header file to support the C++ I/O system using namespace std; // telling the compiler to use namespace "std", // where the entire C++ library is declared. int main() { // Print out a sentence on the screen. // "<<" causes the expression on its right to // be directed to the device on its left. // "cout" is the standard output device -- the screen. cout << "Hello World!" << endl; return 0; // returns 0,which indicate the successful // termination of the "main" function }
// This example is from the book _Java in a Nutshell_ by David Flanagan. // Written by David Flanagan. Copyright (c) 1996 O'Reilly & Associates. // You may study, use, modify, and distribute this example for any purpose. // This example is provided WITHOUT WARRANTY either expressed or implied. import java.applet.*; import java.awt.*; public class Scribble extends Applet { private int last_x = 0; private int last_y = 0; private Color current_color = Color.black; private Button clear_button; private Choice color_choices; // Called to initialize the applet. public void init() { // Set the background color this.setBackground(Color.white); // Create a button and add it to the applet. // Also, set the button's colors clear_button = new Button("Clear"); clear_button.setForeground(Color.black); clear_button.setBackground(Color.lightGray); this.add(clear_button); // Create a menu of colors and add it to the applet. // Also set the menus's colors and add a label. color_choices = new Choice(); color_choices.addItem("black"); color_choices.addItem("red"); color_choices.addItem("yellow"); color_choices.addItem("green"); color_choices.setForeground(Color.black); color_choices.setBackground(Color.lightGray); this.add(new Label("Color: ")); this.add(color_choices); } // Called when the user clicks the mouse to start a scribble public boolean mouseDown(Event e, int x, int y) { last_x = x; last_y = y; return true; } // Called when the user scribbles with the mouse button down public boolean mouseDrag(Event e, int x, int y) { Graphics g = this.getGraphics(); g.setColor(current_color); g.drawLine(last_x, last_y, x, y); last_x = x; last_y = y; return true; } // Called when the user clicks the button or chooses a color public boolean action(Event event, Object arg) { // If the Clear button was clicked on, handle it. if (event.target == clear_button) { Graphics g = this.getGraphics(); Rectangle r = this.bounds(); g.setColor(this.getBackground()); g.fillRect(r.x, r.y, r.width, r.height); return true; } // Otherwise if a color was chosen, handle that else if (event.target == color_choices) { String colorname = (String) arg; if (arg.equals("black")) current_color = Color.black; else if (arg.equals("red")) current_color = Color.red; else if (arg.equals("yellow")) current_color = Color.yellow; else if (arg.equals("green")) current_color = Color.green; return true; } // Otherwise, let the superclass handle it. else return super.action(event, arg); } }
<script type="text/javascript"> // Popup window code function newPopup(url) { popupWindow = window.open( url,'popUpWindow','height=700,width=800,left=10,top=10,resizable=yes,scrollbars=yes,toolbar=yes,menubar=no,location=no,directories=no,status=yes') } </script> <p>Popup Window:</p> <p><a href="JavaScript:newPopup('http://www.quackit.com/html/codes/');">Get your HTML codes in a popup!</a></p> <div class="more-info"> <p>More info: <a href="/javascript/popup_windows.cfm">Popup Windows</a></p> </div>
<!DOCTYPE html> <html> <body> <h1>My first PHP page</h1> <?php echo "Hello World!"; ?> </body> </html>
import re for test_string in ['555-1212', 'ILL-EGAL']: if re.match(r'^\d{3}-\d{4}$', test_string): print test_string, 'is a valid US local phone number' else: print test_string, 'rejected'
# Program to find the factorial of a number # Save this as fact.rb def fact(n) if n == 0 1 else n * fact(n-1) end end puts fact(ARGV[0].to_i)