狐的窩

本文主要介紹C#最基本要件和運算式，以供有興趣的朋友參考。

    static void Main()

    {

        // Declaration statement.

        int counter;

        // Assignment statement.

        counter = 1;

        // Error! This is an expression, not an expression statement.

        // counter + 1; 

        // Declaration statements with initializers are functionally

        // equivalent to pointA declaration statement followed by assignment statement:         

        int[] radii = { 15, 32, 108, 74, 9 }; // Declare and initialize an array.

        const double pi = 3.14159; // Declare and initialize pointA constant.          

        // foreach statement block that contains multiple statements.

        foreach (int radius in radii)

        {

            // Declaration statement with initializer.

            double circumference = pi * (2 * radius);

            // Expression statement (method invocation). A single-line

            // statement can span multiple text lines because line breaks

            // are treated as white space, which is ignored by the compiler.

            System.Console.WriteLine("Radius of circle #{0} is {1}. Circumference = {2:N2}",

                                    counter, radius, circumference);

            // Expression statement (postfix increment).

            counter++;

        } // End of foreach statement block

    } // End of Main method body.

} // End of SimpleStatements class.