P1-P5: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

file.org

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+#+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