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CS1322/p0/P0Phase3.java

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+/**
+ *  CS1322: Programming Assignment #0 - Fall 2002 
+ *
+ *  <PRE>
+ *  P0Phase3.java
+ *  Class P0Phase3 - A class designed to learn methods and
+ *    casting, as well as working with expressions.
+ *
+ *  Revisions: 1.0 Aug. 26, 2002
+ *               Created the P0Phase3 class
+ *
+ *             1.1 Aug. 26, 2002
+ *               Finished, Compiled, Tested
+ *
+ *  </PRE>
+ *
+ *  Collaboration Statement:
+ *    I worked on the homework assignment alone, using only              
+ *    course materials.
+ *
+ *  @author <A HREF="mailto:gtg184g@mail.gatech.edu">Jose Manuel Caban</A>
+ *  @version Version 1.1, Aug. 26, 2002
+ */
+
+public class P0Phase3 {
+
+  ///////////
+  //Methods//
+  ///////////
+
+  /**
+   * Truncate double value into an int
+   *
+   * <br><br>
+   * @param d, value to be truncated
+   * @return truncated value d
+   */
+  public int roundOff(double d){
+    return ((int) d);
+  }
+
+  /**
+   * Divide dividend by divisor
+   *
+   * <br><br>
+   * @param dividend, value to be divided
+   * @param divisor, parts that the divisor will be split into
+   * @return quotient of dividend and divisor
+   */
+  public double divide(int dividend, int divisor){
+    return (((double)dividend / divisor));
+  }
+
+  /**
+   * Mulitply x by 2.5
+   *
+   * <br><br>
+   * @param x value to be multiplied by 2.5
+   * @return value of x*2.5
+   */
+  public double twoANDAHalfTimes(int x){
+    return ((double)(x*2.5));
+  }
+
+  /**
+   * Square the value x
+   *
+   * <BR><BR>
+   * @param x value to be squared
+   * @return value of the square
+   */
+  public double square(double x){
+    return (x*x);
+  }
+
+  /**
+   * Find the value of the quadratic
+   * <br><br>
+   * @param x,a,b,c values to be used in quadratic
+   * @return value of the equation with given values
+   */
+  public double quadratic(double x, int a, int b, int c){
+    //no typecasting needed, the equation is promoted 
+    //to double because x is a double
+    return (a*(x*x) + b*x + c);
+  }
+
+  /**
+   * Solve the Quadratic Equation with given values
+   * <br><br>
+   * @param a,b,c values to be used in quadratic equation
+   * @return value of the quadratic
+   */
+  public double solveQuadr(double a, double b, double c){
+    return (-b + Math.sqrt((b*b) - (4*a*c)))/(2*a);
+  }
+  //////////////////////////////////////////////////////////
+
+  /**
+   *  Debugging main for class P0Phase3.  
+   *  This method will rigorously test my code.
+   *
+   *  <br><br>
+   *  @param args IGNORED
+   */
+  public static void main(String[] args) {
+    //Create variable to test out class
+    P0Phase3 tester = new P0Phase3();
+   
+    //test methods
+    System.out.println(tester.roundOff(5.454));
+    System.out.println(tester.divide(10,3));
+    System.out.println(tester.twoANDAHalfTimes(5));
+    System.out.println(tester.square(2));
+    System.out.println(tester.quadratic(2,2,3,4));
+    System.out.println(tester.solveQuadr(1,2,1));
+   
+  }// end of main(String[] args)
+
+}// end of class P0Phase3