If you use WebAssign, sometimes they give you the button to the "Watch It" which are very helpful. However, you might be able to find the watch it to more than just the problems they give you..
If the URL looks like:
http://www.cengage.com/physics/book_content/1439048622_serway/SerPSE8e_w_player/SerPSE8e_21_033.html
or
http://www.webassign.net/v4cgi/extra/bc_enhanced/index.tpl?asset=watch_it_player&asset_url=/bc_enhanced/SerPSE8_w_player/SerPSE8_25_033.html&UserPass=
Change the URL "SerPSE8_21_033.html"
The "21" is the "chapter" and then the "33" is the "problem number".
Saturday, June 4, 2011
Monday, May 30, 2011
How to write HelloWorld in C?
HelloWorld.c
#include <stdio.h> int main() { printf("Hello world!\n"); }
HelloWorld in C++
HelloWorld.cpp
#include <iostream>
using namespace std;
int main() {
cout << "HelloWorld" << endl;
return 0;
}
using namespace std;
int main() {
cout << "HelloWorld" << endl;
return 0;
}
HelloWorld in Java
For a pure Java HelloWorld:
HelloWorld.java
javac HellWorld.java
java HelloWorld
HelloWorld.java
public class HelloWorld { public static void main(String[] args) { System.out.println("HelloWorld"); } }
javac HellWorld.java
java HelloWorld
HelloWorld in Android
1) Download Eclipse IDE: http://www.eclipse.org/downloads/
2) Download Android SDK for Eclipse: http://developer.android.com/sdk/index.html
-Installing Setup: http://developer.android.com/sdk/installing.html
3) Beginning Tutorial: http://developer.android.com/resources/tutorials/hello-world.html
HelloWorld.java
main.xml
strings.xml
AndroidManifest.xml
Notice: "System.out.println("HelloWorld!");" is not being used because "HelloWorld" is a string pulled from "strings.xml" which is used in the "main.xml"
2) Download Android SDK for Eclipse: http://developer.android.com/sdk/index.html
-Installing Setup: http://developer.android.com/sdk/installing.html
3) Beginning Tutorial: http://developer.android.com/resources/tutorials/hello-world.html
HelloWorld.java
location: HelloWorld > src > com.HelloWord > HelloWorld.java
package com.HelloWorld; import android.app.Activity; import android.os.Bundle; public class Hello extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } }
main.xml
location: HelloWorld > res > layout > main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> </LinearLayout>
strings.xml
location: HelloWorld > res > values > strings.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, Hello!</string> <string name="app_name">HelloWorld</string> </resources>
AndroidManifest.xml
location: HelloWorld > AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.HelloWorld" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="3" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Hello" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Notice: "System.out.println("HelloWorld!");" is not being used because "HelloWorld" is a string pulled from "strings.xml" which is used in the "main.xml"
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