C # Part---function add basic format;

Format 1: No parameters, no return value (no parameter returned)

To add a function:

/// <summary>///summation method, no parameters, no return value/// </summary> Public voidLeijia () {//Accumulate sumConsole.Write ("Please enter a positive integer:");intA =int. Parse (Console.ReadLine ());intsum =0; for(inti =1; I <= A; i++) {sum+=i;} Console.WriteLine ("sum is"+sum);}

(The main function of the wording:)

Static void Main (string[] args)    {// instantiation initializes the class new program (); // Hanshu. First (); // Format 1 Call // Hanshu. Leijia (); }

Format 2: No return value, parameter (with reference not returned)

To add a function:

/// <summary>///Add sum, require an int type parameter, no return value/// </summary>/// <param name= "D" ></param> Public voidLeijia (intd) {intsum =0; for(inti =1; I <= D; i++) {sum+=i;} Console.WriteLine ("sum is"+sum);}

(The main function is written in the notation):

Static void Main (string[] args)        {            // instantiation   Initializes   this class            new Program ();             // Format 2 Call             // Console.Write ("Please enter a positive integer:");             // int a = Int. Parse (Console.ReadLine ());             // Hanshu. Leijia (a);       }

Format 3: Parameters, with return value (with reference to return)

To add a function:

/// <summary>///Add sum, need parameter, return value/// </summary>/// <param name= "D" ></param>/// <returns></returns> Public intLeijia1 (intd) {intsum =0; for(inti =1; I <= D; i++) {sum+=i;}returnsum;}

(notation in the main function:)

 static  void  Main (string  [] args) { // instantiation initialization of this class  program Hanshu = new              program ();  //  format 3 call  // console.write (" Please enter a positive integer: ");  // int a = Int.            Parse (Console.ReadLine ());  // int sum = Hanshu.            Leijia1 (a);        // console.writeline (sum);  }

Format 4: No parameters, return value

To add a function:

/// <summary>///Add sum, no arguments, but with return value (int)/// </summary>/// <returns></returns> Public intLeijia2 () {Console.Write ("Please enter a positive integer:");intA =int. Parse (Console.ReadLine ());intsum =0; for(inti =1; I <= a;i++) {sum+=i;}returnsum;}

(notation in the main function:)

Static void Main (string[] args)        {            // instantiation   Initializes   this class            new Program ();            ;             // Format 4 Call             // int sum =hanshu. Leijia2 ();             // Console.WriteLine (sum);          }

When there are two or more variables in format 3, there are parameters to return such as comparison size

Two number comparison size returns the larger one

To add a function:

 /// </SUMMARY>  /// <param name=" a "></PARAM>  /// <param name=" B "></PARAM>  /// <RETURNS></RETURNS>  public  double  Max (double  A, double   b) { if  (A >= b) { return   A;}  else  { return   b;}  

(notation in the main function:)

 static  void  Main (string  [] args) { // instantiation initialization of this class  program Hanshu = new              program ();  //  compare size  double  a = 6  ;  double  b = 7             ;  double  c = 4             ; Console.WriteLine (Hanshu. Max (Hanshu.         Max (A, B), c)); }

C # Part---function add basic format;