MODULE 3 - SHEET 1

public class Fibonacci
 { public static void main(String[] args)
    { int a=1, b=1, c=a+b, sum=a+b+c;
      while (c < 1000)
       { a = b;
         b = c;
         c = a+b;
         sum += c;
       }
      System.out.println("First term over 1000 is " + c);
      System.out.println("The sum to that term is " + sum);
    }
 }

// This yields:
//
// First term over 1000 is 1597
// The sum to that term is 4180



public class Mins
 { public static void main(String[] args)
    { int mins = 125;
      System.out.println("Time is " + mins/60 + " hours "
                                    + mins%60 + " minutes");
    }
 }



public class FloatIntroA
 { public static void main(String[] args)
    { int i=2;
      float x;
      x = 1.32f/1.1f;
      if (x == 1.2f)
         System.out.println("Don't bank on this!");
      else
         System.out.println("What I feared!");
      x = i;
      System.out.println("x = " + x);
      x = i/3;
      System.out.println("x = " + x);
      x = (float)i/(float)3;
      System.out.println("x = " + x);
    }
 }

// This yields:
//
// Don't bank on this!
// x = 2.0
// x = 0.0
// x = 0.6666667



public class FloatIntroB
 { public static void main(String[] args)
    { int i=2;
      float x;
      x = 1.32f/1.1f;
      System.out.println(x == 1.2f ? "Don't bank on this!" : "What I feared!");
      x = i;
      System.out.println("x = " + x);
      x = i/3;
      System.out.println("x = " + x);
      x = (float)i/(float)3;
      System.out.println("x = " + x);
    }
 }

// This yields:
//
// Don't bank on this!
// x = 2.0
// x = 0.0
// x = 0.6666667



                    MODULE 3 - SHEET 2



public class Greenfly
 { public static void main(String[] args)
    { int m=1;
      int[] im = new int[8];
      for (int i=1; i<=7; i++)
         im[i] = 0;
      for (int day=1; day<=28; day++)
       { m += im[7];
         for (int i=7; i>1; i--)
            im[i] = im[i-1];
         im[1] = 8*m;
       }
      int total = im[1]+im[2]+im[3]+im[4]+im[5]+im[6]+im[7]+m;
      System.out.println("After 28 days the greenfly total is " + total);
    }
 }

// This yields:
//
// After 28 days the greenfly total is 1161889



public class DoubleIntro
 { public static void main(String[] args)
    { float f;
      double x = 2.0d;
      double y = Math.sqrt(x);
      System.out.println("y = " + y);
      f = (float)y;
      System.out.println("f = " + f);
      y = (double)f;
      System.out.println("y = " + y);
      x = Math.sqrt(144.0d);
      System.out.println("x = " + x);
      x = 0d;
      y = 1d;
      double z = Math.atan2(y,x)*180d/Math.PI;
      System.out.println("z = " + z);
    }
 }

// This yields:
//
// y = 1.4142135623730951
// f = 1.4142135
// y = 1.4142135381698608
// x = 12.0
// z = 90.0



public class BoolIntro
 { public static void main(String[] args)
    { boolean p, q, r;
      p = true;
      q = 5<2;
      r = p && q || !(5<2);
      if (r)
       { System.out.println("p = " + p);
         System.out.println("q = " + q);
         System.out.println("r = " + r);
       }
    }
 }

// This yields:
//
// p = true
// q = false
// r = true