C#运算符重载实现复数运算的由来:函数的重载——同名函数,不同的参数(包括参数个数不同和参数个数相同但个数不同)

将其引申,像如下的代码:
- int i=5;
 - int j=2;
 - int sum=i+j;
 
如果没有自定义的C#运算符重载,像+,-,*,/这样的运算符只能用于预定义的数据类型,编译器认为所有常见的运算符都是用于这些数据类型的。
问题来了,如果我要对两个复数或矩阵进行四则运算,就需要我们自己扩展运算符重载函数了。
C#运算符重载之示例:复数的四则运算
- public struct Complex
 - {
 - public int real;
 - public int imaginary;
 - public Complex(int real, int imaginary)
 - {
 - this.real = real;
 - this.imaginary = imaginary;
 - }
 - //overload operator(+),added(two Complex objects) and return a Complex type
 - public static Complex operator +(Complex c1, Complex c2)
 - {
 - return new Complex(c1.real + c2.real, c1.imaginary + c2.imaginary);
 - }
 - //overload operator(-)
 - public static Complex operator -(Complex c1, Complex c2)
 - {
 - return new Complex(c1.real - c2.real, c1.imaginary - c2.imaginary);
 - }
 - //overload operator(*)
 - public static Complex operator *(Complex c1, Complex c2)
 - {
 - return new Complex(c1.real * c2.real - c1.imaginary * c2.imaginary,
 - c1.real * c2.imaginary + c1.imaginary * c2.real);
 - }
 - //overload operator(/)
 - public static Complex operator /(Complex c1, Complex c2)
 - {
 - return new Complex(-c1.real * c2.real +
 - c1.imaginary * c2.imaginary, -c1.real * c2.imaginary + c1.imaginary * c2.real);
 - }
 - // Override the ToString method to display an complex number in the suitable format:
 - public override string ToString()
 - {
 - return (String.Format("{0} + {1}i", real, imaginary));
 - }
 - }
 
C#运算符重载之客户端代码:
- static void Main(string[] args)
 - {
 - Complex num1 = new Complex(2, 3);
 - Complex num2 = new Complex(3, 4);
 - //Add two Complex objects (num1 and num2) through the overloaded plus operator:
 - Complex sum_Add = num1 + num2;
 - Complex sum_Minus = num1 - num2;
 - Complex sum_Product = num1 * num2;
 - Complex sum_Divide = num1 / num2;
 - //Print the numbers and the Result using the overriden ToString method:
 - Console.WriteLine("First complex number: {0}", num1);
 - Console.WriteLine("Second complex number: {0}", num2);
 - Console.WriteLine("The sum of the two numbers: {0}", sum_Add);
 - Console.WriteLine("The Minus of the two numbers: {0}", sum_Minus);
 - Console.WriteLine("The Product of the two numbers: {0}", sum_Product);
 - Console.WriteLine("The Divide of the two numbers: {0}", sum_Divide);
 - Console.ReadLine();
 - }
 
C#运算符重载实例运行结果:
- First complex number: 2 + 3i
 - Second complex number: 3 + 4i
 - The sum of the two numbers: 5 + 7i
 - The Minus of the two numbers: -1 + -1i
 - The Product of the two numbers: -6 + 17i
 - The Divide of the two numbers: 6 + 1i
 
C#运算符重载实现复数运算的实例讲解就到这里,希望对你学习C#运算符重载有所帮助。
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