mcs/tests/test-125.cs

   1 using System;
   2
   3 public class Fraction {
   4
   5         public Fraction(int numerator, int denominator) {
   6                 Console.WriteLine("In Fraction Constructor(int, int)");
   7                 this.numerator = numerator;
   8                 this.denominator = denominator;
   9         }
  10
  11         public Fraction(int wholeNumber) {
  12                 Console.WriteLine("In Fraction Constructor(int)");
  13                 numerator = wholeNumber;
  14                 denominator = 1;
  15         }
  16
  17         // this function is not recognised by mcs further down
  18         public static implicit operator Fraction(int theInt) {
  19                 Console.WriteLine("In implicit conversion to Fraction");
  20                 return new Fraction(theInt);
  21         }
  22
  23         public static explicit operator int(Fraction theFraction) {
  24                 Console.WriteLine("In explicit conversion to int");
  25                 return theFraction.numerator /
  26                         theFraction.denominator;
  27         }
  28
  29         public static bool operator==(Fraction lhs, Fraction rhs) {
  30                 Console.WriteLine("In operator ==");
  31                 if (lhs.denominator == rhs.denominator &&
  32                     lhs.numerator == rhs.numerator) {
  33                         return true;
  34                 }
  35                 // code here to handle unlike fraction
  36                 return false;
  37         }
  38
  39         public static bool operator!=(Fraction lhs, Fraction rhs) {
  40                 Console.WriteLine("In operator !=");
  41                 return !(lhs == rhs);
  42         }
  43
  44         public override bool Equals(object o) {
  45                 Console.WriteLine("In method Equals");
  46                 if (! (o is Fraction)) {
  47                         return false;
  48                 }
  49                 return this == (Fraction) o;
  50         }
  51
  52         public static Fraction operator+(Fraction lhs, Fraction rhs) {
  53                 Console.WriteLine("In operator +");
  54                 if (lhs.denominator == rhs.denominator) {
  55                         return new Fraction(lhs.numerator + rhs.numerator,
  56                                             lhs.denominator);
  57                 }
  58
  59                 // simplistic solution for unlike fractions
  60                 // 1/2 + 3/4 == (1*4) + (3*2) / (2*4) == 10/8
  61                 int firstProduct = lhs.numerator * rhs.denominator;
  62                 int secondProduct = lhs.denominator * rhs.numerator;
  63                 return new Fraction(
  64                                     firstProduct + secondProduct,
  65                                     lhs.denominator * rhs.denominator);
  66         }
  67
  68         public override string ToString() {
  69                 String s = numerator.ToString() + "/" +
  70                         denominator.ToString();
  71                 return s;
  72         }
  73
  74         private int numerator;
  75         private int denominator;
  76 }
  77
  78 public class Tester {
  79         public static int Main() {
  80
  81                 Fraction f1 = new Fraction(3,4);
  82                 Console.WriteLine("f1: {0}", f1.ToString());
  83
  84                 Fraction f2 = new Fraction(2,4);
  85                 Console.WriteLine("f2: {0}", f2.ToString());
  86
  87                 Fraction f3 = f1 + f2;
  88                 Console.WriteLine("f1 + f2 = f3: {0}", f3.ToString());
  89
  90                 Fraction f4 = f3 + 5;
  91                 Console.WriteLine("f3 + 5 = f4: {0}", f4.ToString());
  92
  93                 Fraction f5 = new Fraction(2, 4);
  94                 if (f5 == f2)
  95                         Console.WriteLine("f5: {0} == f2: {1}", f5.ToString(), f2.ToString());
  96
  97
  98                 return 0;
  99         }
 100 }