Preprocessor 2 : Preprocessor Directives « Language Basics « C# / C Sharp

1. C# / C Sharp
2. Language Basics
3. Preprocessor Directives

Preprocessor 2

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
namespace nsPreProc
{
    using System;
    public class PreProc
    {
        static public void Main()
        {
#if ALTMAIN
#warning Compiling alternate statement
            Console.WriteLine ("Using alternate Main()");
#elif OTHERMAIN
#warning Compiling other statement
            Console.WriteLine ("Using other Main()");
#else
#warning Compiling main
            Console.WriteLine ("Using Main()");
#endif
        }

#line 200
#if SHOWERROR
        int iVar;
#error This is line 23 but the error report should show line 202
#endif

    }
}


           
       

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3.	#undef Marco
4.	Use marco to define flag variable
5.	Demonstrates the use of a conditional method
6.	#define, #if, and #endif preprocessor directives
7.	#undef, #elif, and #else preprocessor directives
8.	Demonstrate #if, #endif, and #define
9.	Use a symbol expression
10.	Demonstrate #else
11.	Demonstrate #elif