Notes

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lab4;

import java.util.Scanner;

/**
*
* @author FSKTM
*/
public class L1Q1 {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
System.out.print("Enter an Integer: ");
Scanner scan = new Scanner(System.in);
int num = scan.nextInt();
System.out.print("The factors are: ");
for (int i = 1; i <= num; i++)
{
if (num % i == 0)
{
System.out.print(i+", ");
}
}
}
}

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lab4;

import java.util.ArrayList;
import java.util.Random;

/**
*
* @author FSKTM
*/
public class L1Q2
{
public static void main(String[] args)
{
// Set Biggest prime number
int max=1000;

// Sieve of Erastos
boolean[] isPrime = new boolean[max+1];
for(int i=2; i<=max; i++)
{
isPrime[i] = true;
}

// set nonprime to false
for(int factor=2; factor*factor <= max; factor++)
{
for(int j=factor; factor*j <= max; j++)
{
isPrime[j*factor] = false;
}
}

// Put all primes in a list
ArrayList prime = new ArrayList();
for(int i=0; i<=max;i++)
{
if(isPrime[i])
{
prime.add(i);
}
}

System.out.println(prime.toString());

int randInt = new Random().nextInt(99) + 1; // 1~99
System.out.printf("The %d-th prime is: %dn", randInt, prime.get(randInt-1));





}

}


/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lab4;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

/**
*
* @author FSKTM
*/
public class L1Q3
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
ArrayList<Integer> inputInts = new ArrayList<Integer>();
while (true)
{
System.out.print("Enter a score [negative score to quit]:");
int inputInt = input.nextInt();
if (inputInt <0)
{
break;
}
else
{
inputInts.add(inputInt);
}
}

int max = Collections.max(inputInts);
int min = Collections.min(inputInts);
int sum = 0;
int sumSquared = 0;
for(int i=0; i<inputInts.size(); i++)
{
int num = inputInts.get(i);
sum += num;
sumSquared += Math.pow(num, 2);
}
int N = inputInts.size();
double avr = (double)sum / inputInts.size();
double stdDev = Math.sqrt( (sumSquared - Math.pow(sum, 2) / (double) N ) / (N-1) );

System.out.printf("Max: %d "
+ "Min: %d "
+ "Sum: %d "
+ "Avr: %.2f "
+ "StdDev: %.2f"
+ "n", max, min, sum, avr, stdDev
);
}
}

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lab4;

import java.util.Random;
import java.util.Scanner;

/**
*
* @author FSKTM
*/
public class L1Q4
{

public static void main(String[] args)
{
int score1 = 0;
int score2 = 0;
int winScore = 101;

Random rand = new Random();
Scanner input = new Scanner(System.in);


while (score1 < 100 && score2 < 100)
{
int die1 = 0;
do
{
if (die1 == 6)
System.out.println("Congrats, P1! You've got a 6! Extra roll!");
System.out.print("P1, please <Enter> to roll: ");
input.nextLine();
die1 = rand.nextInt(6) + 1;
System.out.printf("You roll a [%d]!n", die1);
score1 += die1;
System.out.printf("[P1: %d] P2: %dnn", score1, score2);
if (score1 >= winScore)
{
System.out.println("P1 wins!");
return;
}
} while (die1 == 6);

int die2 = 0;
do
{
if (die2 == 6)
System.out.println("Congrats, P2! You've got a 6! Extra roll!");
System.out.print("P2, please <Enter> to roll: ");
input.nextLine();
die2 = rand.nextInt(6) + 1;
System.out.printf("You roll a [%d]!n", die2);
score2 += die2;
System.out.printf("P1: %d [P2: %d]nn", score1, score2);
if (score2 >= winScore)
{
System.out.println("P2 wins!");
return;
}
} while (die2 == 6);
}
}
}

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lab4;

import java.util.Random;

/**
*
* @author FSKTM
*/
public class L1Q5
{
public static void main(String[] args)
{
final int MAX_DIGIT = 8;
Random rand = new Random();
int number = rand.nextInt( (int)Math.pow(10, MAX_DIGIT) );
System.out.printf("Number: %dn", number);
int digitCount = 0;
while(number > 0)
{
digitCount ++;
number = number / 10;
}
System.out.printf("No. digit: %2d n", digitCount);
}
}

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package lab4;

import java.util.Scanner;

/**
*
* @author FSKTM
*/
public class L1Q6
{
public static void main(String[] args)
{
int N; // Total num months
double M, // Monthly payment
P, // Principal
i, // yearly interest in %
Cn, // Principal portion due
Ln, // interest due
Rn, // remaining principal balance due
Ti = 0; // total interest

// Get inputs
Scanner input = new Scanner(System.in);
System.out.print("Enter principal amount: ");

// P = input.nextDouble();
System.out.print("Enter interest in %: ");
// i = input.nextDouble();
System.out.print("Enter total number of month(s): ");
// N = input.nextInt();

// Test
System.out.println("");
P = 1000; i=4; N=12;

// Print table title
// System.out.println("MonthtMonthly PaymenttPrincipaltInterestt"
// + "Unpaid BalancetTotal Interest");
System.out.printf("%-10s%15s%15s%15s%15s%15s%n",
"Month",
"Monthly Payment",
"Principal",
"Interest",
"Unpaid Balance",
"Total Interest");
// Print every month in row
for (int n=1; n <= N; n++)
{
M = ( P * i/(12*100) ) / ( 1 - Math.pow(1 + i/(12*100) , -N) );
Cn = M * Math.pow( 1 + i/(12*100), -(1+N-n) );
Ln = M - Cn;
Rn = Ln /( i/(12*100) ) - Cn;
Ti += Ln;

System.out.printf("%-10d%15f%15f%15f%15f%15f%n",
n, M, Cn, Ln, Rn, Ti);
}

}
}