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P1-P5: rewrite to match current syllabus

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Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2023-06-05 00:09:49 +05:30
parent 9006831163
commit 539adc94da
7 changed files with 209 additions and 214 deletions
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98
P1.java
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@@ -1,8 +1,92 @@
class P1 {
public static void main(String[] _args) {
int a = 44;
int b = 56;
class Stack {
private int[] array;
private int top;
public Stack(int capacity) {
array = new int[capacity];
top = -1;
}
public void push(int item) {
if (top == array.length - 1) {
System.out.println("Stack Overflow");
} else {
array[++top] = item;
System.out.println("Pushed " + item + " to the stack");
}
}
public int pop() {
if (top == -1) {
System.out.println("Stack Underflow");
return -1;
} else {
int item = array[top--];
System.out.println("Popped " + item + " from the stack");
return item;
}
}
public boolean isEmpty() {
return top == -1;
}
}
System.out.println(a + " + " + b + " = " + (a + b));
}
}
class Queue {
private int[] array;
private int front;
private int rear;
private int size;
public Queue(int capacity) {
array = new int[capacity];
front = 0;
rear = -1;
size = 0;
}
public void enqueue(int item) {
if (size == array.length) {
System.out.println("Queue is full");
} else {
rear = (rear + 1) % array.length;
array[rear] = item;
size++;
System.out.println("Enqueued " + item + " to the queue");
}
}
public int dequeue() {
if (size == 0) {
System.out.println("Queue is empty");
return -1;
} else {
int item = array[front];
front = (front + 1) % array.length;
size--;
System.out.println("Dequeued " + item + " from the queue");
return item;
}
}
public boolean isEmpty() {
return size == 0;
}
}
public class P1 {
public static void main(String[] args) {
Stack stack = new Stack(5);
stack.push(1);
stack.push(2);
stack.pop();
stack.pop();
stack.pop();
Queue queue = new Queue(5);
queue.enqueue(1);
queue.enqueue(-4);
queue.dequeue();
queue.dequeue();
}
}

22
P2.java
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@@ -1,11 +1,15 @@
class P2 {
public static void main(String[] _args) {
int a = 5, b, f;
b = f = a;
import java.util.StringTokenizer;
while (b-- > 1)
f *= b;
public class P2 {
public static void main(String[] args) {
String input = "Hello, I am Batu Khan and I am about to blow.";
StringTokenizer tokenizer = new StringTokenizer(input, " ,");
System.out.println(a + "! = " + f);
}
}
int i = 0;
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
System.out.println("Token " + ++i + ": " + token);
}
}
}

37
P3.java
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@@ -1,14 +1,27 @@
class P3 {
public static void main(String[] _args) {
int a = 5, b = -5, c = 55, mx;
interface Animal {
void makeSound();
}
if (a > b && a > c)
mx = a;
else if ( b > a && b > c)
mx = b;
else
mx = c;
class Cat implements Animal {
@Override
public void makeSound() {
System.out.println("Meow!");
}
}
System.out.println("max(" + a + ", " + b + ", " + c + ") = " + mx);
}
}
class Cow implements Animal {
@Override
public void makeSound() {
System.out.println("Moo!");
}
}
public class P3 {
public static void main(String[] args) {
Animal cat = new Cat();
Animal cow = new Cow();
cat.makeSound();
cow.makeSound();
}
}

68
P4.java
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@@ -1,15 +1,57 @@
class P4 {
public static void main(String[] _args) {
int n = 10;
int a = 0, b = 1;
System.out.println("First " + n + " elements of the fibonacci series:");
new P4().fibo(n, a, b);
}
class ProducerConsumer {
private int limit = 5;
private int tmp = 0;
private int n = 0;
private int m = 0;
void fibo(int n, int a, int b) {
if (n == 0)
return;
System.out.println(a);
fibo(n - 1, b, a + b);
public void produce() throws InterruptedException {
int value = 0;
while (n++ < limit * 2) {
synchronized (this) {
while (tmp == limit) {
wait();
}
System.out.println("Producer produced: " + tmp++);
notify();
}
}
}
}
public void consume() throws InterruptedException {
while (m++ < limit * 2) {
synchronized (this) {
while (tmp == 0) {
wait();
}
System.out.println("Consumer consumed: " + --tmp);
notify();
}
}
}
}
public class P4 {
public static void main(String[] args) {
ProducerConsumer pc = new ProducerConsumer();
Thread producerThread = new Thread(() -> {
try {
pc.produce();
} catch (InterruptedException e) {
e.printStackTrace();
}
});
Thread consumerThread = new Thread(() -> {
try {
pc.consume();
} catch (InterruptedException e) {
e.printStackTrace();
}
});
producerThread.start();
consumerThread.start();
}
}

43
P5.java
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@@ -1,20 +1,27 @@
import java.util.function.Consumer;
class P5 {
public static void main(String[] _args) {
int sub[] = { 64, 91, 45 };
P5 obj = new P5();
int sum = 0;
for (int i = 0; i < sub.length; i++) {
obj.grade(sub[i], i + 1);
sum += sub[i];
}
System.out.println("Overall Percentage: " + (float) sum / 3 + "%");
}
void grade(int n, int s) {
System.out.println( "Subject " + s + " grade: " + (char)( n >= 90 ? 'A' : n < 50 ? 'F' : 'A' + (9 - n / 10)));
class MyException extends Exception {
public MyException(String message) {
super(message);
}
}
public class P5 {
public static void main(String[] args) {
try {
int result = divide(10, 0);
System.out.println("Result: " + result);
} catch (MyException e) {
System.out.println("My Exception: " + e.getMessage());
} catch (ArithmeticException e) {
System.out.println("Arithmetic Exception: " + e.getMessage());
} finally {
System.out.println("Finally block executed.");
}
}
public static int divide(int num1, int num2) throws MyException {
if (num2 == 0) {
throw new MyException("Division by zero not allowed.");
}
return num1 / num2;
}
}

155
file.org
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@@ -1,155 +0,0 @@
#+LATEX_CLASS_OPTIONS: [a4paper,12pt]
#+LATEX_HEADER: \usepackage[margin=0.5in]{geometry}
#+LATEX_HEADER: \usepackage{fontspec}
#+LATEX_HEADER: \setmainfont{LiberationSerif}
#+LATEX_HEADER: \date{}
#+OPTIONS: toc:nil
|------------------------------------------------------------------------------------------------------------|
| Programs are followed by their respective inputs and outputs i.e, both stdin and stdout are shown together |
|------------------------------------------------------------------------------------------------------------|
* Sum of two numbers
#+ATTR_LATEX: :options frame=single,breaklines=true
#+begin_src java :tangle P1.java :results output :exports both :wrap src text
class P1 {
public static void main(String[] _args) {
int a = 44;
int b = 56;
System.out.println(a + " + " + b + " = " + (a + b));
}
}
#+end_src
Output:
#+RESULTS:
#+begin_src text
44 + 56 = 100
#+end_src
#+latex: \clearpage
* Factorial of a number
#+ATTR_LATEX: :options frame=single,breaklines=true
#+begin_src java :tangle P2.java :results output :exports both :wrap src text
class P2 {
public static void main(String[] _args) {
int a = 5, b, f;
b = f = a;
while (b-- > 1)
f *= b;
System.out.println(a + "! = " + f);
}
}
#+end_src
Output:
#+RESULTS:
#+begin_src text
5! = 120
#+end_src
#+latex: \clearpage
* Greatest of 3 numbers
#+ATTR_LATEX: :options frame=single,breaklines=true
#+begin_src java :tangle P3.java :results output :exports both :wrap src text
class P3 {
public static void main(String[] _args) {
int a = 5, b = -5, c = 55, mx;
if (a > b && a > c)
mx = a;
else if ( b > a && b > c)
mx = b;
else
mx = c;
System.out.println("max(" + a + ", " + b + ", " + c + ") = " + mx);
}
}
#+end_src
Output:
#+RESULTS:
#+begin_src text
max(5, -5, 55) = 55
#+end_src
#+latex: \clearpage
* Fibbonaci series
#+ATTR_LATEX: :options frame=single,breaklines=true
#+begin_src java :tangle P4.java :results output :exports both :wrap src text
class P4 {
public static void main(String[] _args) {
int n = 10;
int a = 0, b = 1;
System.out.println("First " + n + " elements of the fibonacci series:");
new P4().fibo(n, a, b);
}
void fibo(int n, int a, int b) {
if (n == 0)
return;
System.out.println(a);
fibo(n - 1, b, a + b);
}
}
#+end_src
max(5, -5, 55) = 55
#+RESULTS:
#+begin_src text
First 10 elements of the fibonacci series:
0
1
1
2
3
5
8
13
21
34
#+end_src
#+latex: \clearpage
* Percentage marks and grades for 3 subjects
#+ATTR_LATEX: :options frame=single,breaklines=true
#+begin_src java :tangle P5.java :results output :exports both :wrap src text
import java.util.function.Consumer;
class P5 {
public static void main(String[] _args) {
int sub[] = { 64, 91, 45 };
P5 obj = new P5();
int sum = 0;
for (int i = 0; i < sub.length; i++) {
obj.grade(sub[i], i + 1);
sum += sub[i];
}
System.out.println("Overall Percentage: " + (float) sum / 3 + "%");
}
void grade(int n, int s) {
System.out.println( "Subject " + s + " grade: " + (char)( n >= 90 ? 'A' : n < 50 ? 'F' : 'A' + (9 - n / 10)));
}
}
#+end_src
#+RESULTS:
#+begin_src text
Subject 1 grade: D
Subject 2 grade: A
Subject 3 grade: F
Overall Percentage: 66.666664%
#+end_src
#+latex: \clearpage

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