1. What’s cheating and what is not?
Looking at slides?
Looking at code?

2. Review:
Reading values from user: int (number of tickets), double (ratio),…
Declaring and using variables (updating values of variables)
Picking random values (without understanding too much)
String concatenation
Boolean operators
If-else statement
Use of loops: while, for
Printing
+Scope/life of a variable
Writing a program from scratch.

3. Creating random number with hidden classes:
Write a program that creates some random numbers for tickets which can be categorized into two classes(normal and marked/hidden class) by checking the average of all its digits (if it falls in-between two boundaries set as minimum mean and maximum mean). We would like our program to get the following inputs from the user:
Number of digits to be used for each number
Total number of tickets
The ratio of number of tickets in the hidden class over number of all tickets (0-1)
Minimum value for mean of digits for the hidden class
Maximum value for mean of digits for the hidden class

4. Sample outputs

5. The steps we will consider for our review:
Create one ticket
Create many tickets
Classify tickets
Count tickets in each class
Set number of samples in each class
Put it together

6. public class RandomTickets extends ConsoleProgram {
public void run() {
//Getting user inputs
int numDigits=readInt("Specify number of digits:");
int numTickets=readInt("Specify number of tickets:");
double minMean=readDouble("Specify min value for means:");
double maxMean=readDouble("Specify max value for means:");
double ratio=readDouble("Ratio(0-1):");
//Computing number of tickets in each class
int numMarked=(int)(numTickets*ratio);
int numRegular=numTickets-numMarked;
//Creating counters
int countMarked=0;
int countRegular=0;
//Main loop: since we do not know how many tickets should be created
// we should use a while loop
while(countRegular<numRegular || countMarked<numMarked){
//Create a ticket, and compute mean of its digits
String ticket="";
int total=0;
for(int i=0;i<numDigits;i++){
int randInt=rgen.nextInt(0,9);
ticket=ticket+randInt;
total=total+randInt; }
double mean=1.0*total/numDigits;
//Checking if ticket is marked(i.e. belongs to the hidden class)
if(mean>minMean && mean<maxMean && countMarked<numMarked){
println(ticket+"-marked");
countMarked=countMarked+1;
}else{
if(countRegular<numRegular){
println(ticket);
countRegular=countRegular+1;
println("Number of marked tickets: "+countMarked);
println("Number of regular tickets: "+countRegular);
private RandomGenerator rgen=RandomGenerator.getInstance();