import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;


public class newquiz extends Applet
{String fileToRead = "quiz.txt";  // this is where we set file to read
StringBuffer strBuff;
Font f= new Font("Monotype Corsiva",Font.BOLD,24);  //title
  Label title = new Label("                                          ");
  Label  question = new Label("                                ")  ;
  Label  result1= new Label("                                ")  ;
  Label  result2= new Label("                                ")  ;
  Label  result3= new Label("                                ")  ;
  Label response = new Label("                                ");
 String[] questions = new String[25];
 String[] ans1 = new String[25];
 String[] ans2 = new String[25];
 String[] ans3 = new String[25];
 String[] ans4 = new String[25];
 String[] ca = new String[25];
 int ct,answered;
 double right,wrong;  // otherwise we get integer division
  CheckboxGroup trivia = new CheckboxGroup();
 Button done = new Button("Push for next question");
 Checkbox a1 = new Checkbox(" ",trivia,false); // objects that are
 Checkbox a2 = new Checkbox(" ",trivia,false);   // constructed
 Checkbox a3 = new Checkbox(" ",trivia,false );    // will be added
 Checkbox a4 = new Checkbox(" ",trivia,false);
 Checkbox a5 = new Checkbox("",trivia,false);  // non-showing box used to clear others
 int next;  // whether next question has been selected yet
 int printedtime = 0;


public void init()
{ setBackground ( Color.white );
resize(600,300);
String prHtml = this.getParameter("fileToRead");
  if (prHtml != null) fileToRead = new String(prHtml);
int ct3 = 0;
String an1,an2,an3,an4,c,q;

setLayout(new GridLayout(12,1));     // put objects right underneath each other
add(question);

URL url = null;
  try{
  url = new URL(getCodeBase(), fileToRead);
  }
  catch(MalformedURLException e){}
  
  try{
  InputStream in = url.openStream();
  BufferedReader br = new BufferedReader(new InputStreamReader(in));
  strBuff = new StringBuffer();
  
  
while ((q = br.readLine()) != null)   {
 an1 = br.readLine();
 an2 = br.readLine();
 an3 = br.readLine();
 an4 = br.readLine();
 c = br.readLine();
 questions[ct3] = q;
 ans1[ct3] = an1;
 ans2[ct3] = an2;
 ans3[ct3] = an3;
 ans4[ct3] = an4;
 ca[ct3] = c;
 ct3++;
  }
  in.close();
    }catch (Exception e){
  System.err.println("Error: " + e.getMessage());
  }
right =0; wrong = 0;
ct =0;  // which question to start with

add(a1);
add(a2);
add(a3);
add(a4);
add(response);	    // will print out right or wrong
add(done);		   // push a key for question
add(result1);  // for responding to how they did
add(result2);
add(result3);
result2.setText("");
result3.setText("");
result1.setText("");
question.setText(ct + 1 +".  "+questions[ct]);
a1.setLabel(ans1[ct]);	   // next set of answers
a2.setLabel(ans2[ct]);     // put into already constructed objects
a3.setLabel(ans3[ct]);
a4.setLabel(ans4[ct]);
next =1;
}

public boolean action(Event event, Object obj)
 {Object oTarget = event.target;
  Checkbox choice ;		   // had to make choice global to function
  if (oTarget instanceof Checkbox && next ==1)
  {	   next =0;    // won't take another selection until new question button
	 choice = trivia.getCurrent();
     if (choice == a1 && (ca[ct].compareTo("a") ==0))
	 { right++;	  response.setText("Correct");
	 }
	 else
		 if (choice == a2 && (ca[ct].compareTo("b") ==0))
        	 { right++;	  response.setText("Correct");
        	 }
		   else
		   if (choice == a3 && (ca[ct].compareTo("c") ==0))
        	 { right++;	  response.setText("Correct");
        	 }
			 else
		    if (choice == a4 && (ca[ct].compareTo("d") ==0))
        	 { right++;	  response.setText("Correct");
        	 }
            else
         	 { wrong++;
         	    response.setText("Sorry, wrong answer");
		    }

if (printedtime ==0 && ct == 4)  // give score  - done with quiz
{ printedtime =1;	// don't print again
  next = 0;  // don't let them select button again
  if (wrong ==0)
   {
   result3.setText("All Correct");
    }
   else
     {
       result2.setText("Your final score is "+(right/(right+wrong)*100));
     }
 } // printed time == 0 results not printed yet
}  // if checkbox
  else
 if (oTarget instanceof Button && next == 0)  // don't let them go on until they have answered last question
    {choice = trivia.getCurrent();	// need this because of scope
     next =1;   // sets it so we can answer next question
	if (ct < 5)
	{
     ct = ct+1;
      a1.setLabel(ans1[ct]);
      a2.setLabel(ans2[ct]);
      a3.setLabel(ans3[ct]);
      a4.setLabel(ans4[ct]);
       a5.setState(true);     //set non-showing button to true to clear 
                                // a1.setState(false) didn't clear it
       response.setText("");
       question.setText(ct + 1 +".  "+questions[ct]);
       
     }  // if cnt < question.length
  } // button
 return true;
	}	// function action
}