C # Delegate and C's function pointers

Introduction:

A small example, hope can help the vast number of Chevalier to understand delegate.

Example of a function pointer in C:

1#include <stdio.h>2   3       //Subtraction Operations4       intMinus (intAintb) {5           returnAb;6       }7   8       //addition Operation9       intSumintAintb) {Ten          returnA +b; One      } A   -      //This counting function is used to do the calculation between A and B, as for addition or subtraction, which is determined by the 1th parameter of the function. -      voidCounting (int(*p) (int,int) ,intAintb) { the          intresult =P (A, b); -printf"The result is:%d\n", result); -      } -   +      intMain () -      { +          //perform addition operations ACounting (SUM,6,4); at           -          //perform the subtraction operation -Counting (minus,6,4); -           -          return 0; -}

This code is quoted from: Http://www.cnblogs.com/mjios/archive/2013/03/19/2967037.html.

This page has a detailed tutorial on pointers to functions, and if you are not very familiar with C Chevalier, you can go to the exact point.

Write your own C # code:

1    classupstatic2     {3          Public Delegate intCalculateintAintb);4          Public intAddintAintb)5         {6             returnA +b;7         }8          Public intMinus (intAintb)9         {Ten             returnAb; One         } A          Public intMultiplyintAintb) -         { -             returnAb; the         } -          Public intCountintAintb, calculate c) -         { -             intresult =C (A, b); +             returnresult; -         } + } A  at     class Program -     { -  -         Static voidMain (string[] args) -         { -             varTest =Newupstatic (); in             intp = Test.count ( -, -, Test.add); -             intQ = Test.count ( -, -, Test.minus); to             intR = Test.count ( -, -, test.multiply); + Console.WriteLine (p); - Console.WriteLine (q); the Console.WriteLine (r); * Console.read (); $         }Panax Notoginseng}

Enlightenment:

Castles in the castle are always unsettling, and the base is high.

To lay a good foundation, we can stand steady.

　　

C # Delegate and C's function pointers