8.1 Functions

Source: Internet
Author: User

Label:

Function: A module capable of accomplishing a function independently.

Function four elements: input, output, function body, functional name

function definition:
(static/public) return type function name (parameter type parameter name, parameter type argument name)
{
function body
}

Call to function:
Return variable type variable name = function (argument value)


Case: Entering a number for factorial (written as a function call)
public void Jie ()
{
Console.Write ("Please enter a=");
int a = Int. Parse (Console.ReadLine ());
int jie = 1;
for (int i = 1; i <= A; i++)
{
Jie *= i;
}
Console.Write ("Factorial result is:" + Jie);
Console.ReadLine ();
}
static void Main (string[] args)
{
Program Hanshu = new program ();
First you need to initialize this class
Hanshu. Jie ();


Can be written as: With the value of the
<summary>
Find factorial
</summary>
public void Jie (int a)
{
int jie = 1;
for (int i = 1; i <= A; i++)
{
Jie *= i;
}
Console.Write ("Factorial result is:" + Jie);
Console.ReadLine ();
}
static void Main (string[] args)
{
Program Hanshu = new program ();
First you need to initialize this class
Console.Write ("Please enter a=");
int a = Int. Parse (Console.ReadLine ());
Hanshu. Jie (a);


Can be written as a value plus a return value:
<summary>
Find factorial
</summary>
public int Jie (int a)
{
int jie = 1;
for (int i = 1; i <= A; i++)
{
Jie *= i;
}
return jie;
}
static void Main (string[] args)
{
Program Hanshu = new program ();
First you need to initialize this class
Console.Write ("Please enter a=");
int a = Int. Parse (Console.ReadLine ());

Console.Write ("Factorial result is:" + Hanshu. Jie (a));
Console.ReadLine ();

Can be written as a non-pass value but with a return value:
<summary>
Find factorial
</summary>
public int Jie ()
{
Console.Write ("Please enter a=");
int a = Int. Parse (Console.ReadLine ());
int jie = 1;
for (int i = 1; i <= A; i++)
{
Jie *= i;
}
return jie;
}
static void Main (string[] args)
{
Program Hanshu = new program ();
First you need to initialize this class
Console.Write ("Factorial result is:" + Hanshu. Jie ());
Console.ReadLine ();


Example: Write a function that returns the maximum value. Call.
<summary>
Two number comparison size returns a large
</summary>
<param name= "a" ></param>
<param name= "B" ></param>
<returns></returns>
public int Max (int a, int b)
{
if (a > B)
{
return A;
}
Else
{
return b;
}
}
static void Main (string[] args)
{
Program Hanshu = new program ();
First you need to initialize this class
Console.WriteLine (Hanshu. Max (Hanshu. Max (A, B), c));
Functions can be used more than once, but can also be nested using

Refinement

namespace function
{
Class Program
{
Format 1: No reference, no return
<summary>
Add sum, no arguments, no return value
</summary>
public void Leijia ()
{
Accumulate sum
Console.Write ("Please enter a positive integer:");
int a = Int. Parse (Console.ReadLine ());
int sum = 0;
for (int i = 1; i <= A; i++)
{
sum + = i;
}
Console.WriteLine (sum);
Console.ReadLine ();
}

Format 2: No reference and return
public int LeiJia1 ()
{
Accumulate sum
Console.Write ("Please enter a positive integer:");
int a = Int. Parse (Console.ReadLine ());
int sum = 0;
for (int i = 1; i <= A; i++)
{
sum + = i;
}

return sum;
}

Format 3: With reference to return
public int LeiJia2 (int a)
{
Accumulate sum
int sum = 0;
for (int i = 1; i <= A; i++)
{
sum + = i;
}
return sum;
}


Format 4: There is no return
public void LeiJia3 (int a)
{
Accumulate sum
int sum = 0;
for (int i = 1; i <= A; i++)
{
sum + = i;
}
Console.WriteLine (sum);
Console.ReadLine ();
}


There are parameters that do not need to be received in the function body.
There is a return value indicating that I need to use this result in the following
You need to define a variable receiving of the same data type when calling a function


function, the comparison size returns the large
Public double Max (double A, double b)
{
if (a > B)
{
return A;
}
Else//a<=b
{
return b;
}
}
Functions can be nested, but functions cannot be nested

public void You ()//mailbox, no reference, no return
{
Console.Write ("Please enter e-mail:");
String yx = Console.ReadLine ();
if (YX. Contains ("@"))
{
int A=yx. IndexOf ("@");
int B=yx. LastIndexOf ("@");
if (a = = b)
{
if (!yx. StartsWith ("@"))
{
String c = Yx. Substring (a);
if (C.contains ("."))
{
String D=yx. Substring (a-1,1);
String e = Yx. Substring (A, 1);
if (d!= ".") &&e!= ".")
{
if (!yx. EndsWith ("."))
{
Console.WriteLine ("The format of the mailbox you entered is correct");
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}

}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console. WriteLine ("Email input error");
}
Console.ReadLine ();
}

public string YOU2 ()//non-parametric return
{
Console.Write ("Please enter e-mail:");
String yx = Console.ReadLine ();
if (YX. Contains ("@"))
{
int a = YX. IndexOf ("@");
int B = Yx. LastIndexOf ("@");
if (a = = b)
{
if (!yx. StartsWith ("@"))
{
String c = Yx. Substring (a);
if (C.contains ("."))
{
String d = yx. Substring (A-1, 1);
String e = Yx. Substring (A, 1);
if (d! = "." && E! = ".")
{
if (!yx. EndsWith ("."))
{
Console.WriteLine ("The format of the mailbox you entered is correct");
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}

}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}

return YX;
}

There is a return of the participants
public string You3 (string yx)
{
if (YX. Contains ("@"))
{
int a = YX. IndexOf ("@");
int B = Yx. LastIndexOf ("@");
if (a = = b)
{
if (!yx. StartsWith ("@"))
{
String c = Yx. Substring (a);
if (C.contains ("."))
{
String d = yx. Substring (A-1, 1);
String e = Yx. Substring (A, 1);
if (d! = "." && E! = ".")
{
if (!yx. EndsWith ("."))
{
Console.WriteLine ("The format of the mailbox you entered is correct");
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}

}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
return YX;
}

There is no return


public void You4 (string yx)
{
if (YX. Contains ("@"))
{
int a = YX. IndexOf ("@");
int B = Yx. LastIndexOf ("@");
if (a = = b)
{
if (!yx. StartsWith ("@"))
{
String c = Yx. Substring (a);
if (C.contains ("."))
{
String d = yx. Substring (A-1, 1);
String e = Yx. Substring (A, 1);
if (d! = "." && E! = ".")
{
if (!yx. EndsWith ("."))
{
Console.WriteLine ("The format of the mailbox you entered is correct");
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}

}
Else
{
Console.WriteLine ("Email input error");
}
}
Else
{
Console.WriteLine ("Email input error");
}
Console.ReadLine ();
}


Add 10 points to the array.
Public double[] Jiafen (double[] score)
{
for (int i = 0; i < score. Length; i++)
{
Score[i] + = 10;
}
return score;
}

public int renzong = 0;
public int dianzong = 0;

public string Cai ()
{
Console.Write ("Please enter what you punch (scissors, stone, cloth):");
String shu = Console.ReadLine ();

if (Shu = = "Scissors" | | shu = = "Stone" | | shu = = "cloth")
{
int ren = 0;
Switch (SHU)
{
Case "Scissors":
ren = 1;
Break
Case "stone":
ren = 2;
Break
Case "cloth":
ren = 3;
Break
}
Random ran = new random ();
int dian = ran. Next (1, 4);
Switch (DIAN)
{
Case 1:
Console.WriteLine ("Computer Out Scissors");
Break
Case 2:
Console.WriteLine ("Computer Out of stone");
Break
Case 3:
Console.WriteLine ("Computer Out of cloth");
Break
}
int jie = Ren-dian;
if (Jie = = 0)
{
Return "draw in this round! ";
}
else if (Jie = = 1 | | jie = =-2)
{
Return "This round wins!" ";
}
Else
{
Return "The failure of this round!" ";
}
}
Else
{
Return "wrong input! ";
}
}
public void Tizhong ()
{
Console.Write ("Please enter gender");
string s = Console.ReadLine ();
Console.Write ("Please enter your weight");
Double T = Double. Parse (Console.ReadLine ());
Console.Write ("Please enter your height");
Double g = Double. Parse (Console.ReadLine ());
if (s = = "Male")
{
Double n = t-g + 100;
if (n > 3 && N <=-3)
{
Console.WriteLine ("You are the standard weight");
}
else if (n > 3)
{
Console.WriteLine ("Your weight is too fat");
}
Else
{
Console.WriteLine ("Your Weight is thin");
}
}
else if (s = = "female")
{
Double n = t-g + 110;
if (n > 3 && N <=-3)
{
Console.WriteLine ("You are the standard weight");
}
else if (n > 3)
{
Console.WriteLine ("Your weight is too fat");
}
Else
{
Console.WriteLine ("Your Weight is thin");
}
}
Else
{
Console.WriteLine ("Your input is incorrect");
}
Console.ReadLine ();
}


static void Main (string[] args)
{
Required: Write a function to calculate whether the weight standard
function requires three input values, gender, weight kg, height cm
Male: Height -100= weight ±3kg
Female: Height -110= weight ±3kg
Console.Write ("Please enter Gender");
string s = Console.ReadLine ();
Console.Write ("Please enter your weight");
Double t = double. Parse (Console.ReadLine ());
Console.Write ("Please enter your height");
Double g = Double. Parse (Console.ReadLine ());
if (s = = "Male")
{
Double n = t-g + +;
if (n > 3 && N <=-3)
{
Console.WriteLine ("You are the standard weight");
}
Else if (n > 3)
{
Console.WriteLine ("Your weight is overweight");
}
Else
{
Console.WriteLine ("Your Weight is thin");
}
}
Else if (s = = "female")
{
Double n = t-g + +;
if (n > 3 && N <=-3)
{
Console.WriteLine ("You are the standard weight");
}
Else if (n > 3)
{
Console.WriteLine ("Your weight is overweight");
}
Else
{
Console.WriteLine ("Your Weight is thin");
}
}
Else
{
Console.WriteLine ("Your input is incorrect");
}
Console.ReadLine ();
Program Hanshu = new program ();
Hanshu.tizhong ();

First, initialize the class you are in.
Program Hanshu = new program ();
Hanshu. Leijia ();
int sum = Hanshu. LeiJia1 ();
Add another 10 points to this value.
sum + = 10;

int sum= Hanshu. LEIJIA2 (5);

Console.WriteLine (sum);
Console.ReadLine ();


Hanshu. LEIJIA3 (5);

Console.Write ("Please enter a=");
Double A = double. Parse (Console.ReadLine ());
Console.Write ("Please enter b=");
Double b = Double. Parse (Console.ReadLine ());
Console.Write ("Please enter c=");
Double c = Double. Parse (Console.ReadLine ());
Double max = Hanshu. Max (Hanshu. Max (A, B), c);

Console.WriteLine (max);
Console.ReadLine ();


Enter your email account to determine if the format is correct
Program Han = new program ();
Han.you ();


String yx = Han.you2 ();
Console.WriteLine (YX);
Console.ReadLine ();

Console.WriteLine ("Please enter your email address");
String yx = Han.you3 (Console. ReadLine ());
Console.WriteLine (YX);
Console.ReadLine ();

Console.WriteLine ("Please enter your email address");
Han.you4 (Console. ReadLine ());

Enter the class number and enter each person's score according to the number of people
Since this class is a minority, we need to add 10 points.
A procedure that adds 10 points requires a function
Console.Write ("Please enter class Number:");
int a = Int. Parse (Console.ReadLine ());
Double [] Score =new double [A];
for (int i = 0; i < A; i++)
{
Console.Write ("Please enter the score for {0} individual:", i+1);
Score[i] = double. Parse (Console.ReadLine ());
}
Console.WriteLine ("All students score input completed, please press ENTER to continue!") ");
Console.ReadLine ();
Initialization
Program Hanshu = new program ();
Score = Hanshu. Jiafen (score);

foreach (double AA in Score)
{
Console.WriteLine (AA);
}
Console.ReadLine ();

Scissors
Man-Machine battle
Scissors 1
Stone 2
Baggage 3
Person Input: (scissors, stone, cloth)
0 draw
1 won.
-1 lost.
-2 won.
2 lost.
Console.Write ("Please enter what you punch (scissors, stone, cloth):");
String shu = Console.ReadLine ();

if (Shu = = "Scissors" | | shu = = "Stone" | | shu = = "cloth")
{
int ren = 0;
Switch (SHU)
{
Case "Scissors":
ren = 1;
Break
Case "stone":
ren = 2;
Break
Case "cloth":
ren = 3;
Break
}
Random ran = new random ();
int dian = ran. Next (1, 4);
Switch (DIAN)
{
Case 1:
Console.WriteLine ("Computer Out Scissors");
Break
Case 2:
Console.WriteLine ("Computer Out of stone");
Break
Case 3:
Console.WriteLine ("Computer Out of cloth");
Break
}
int jie = Ren-dian;
if (Jie = = 0)
{
Console.WriteLine ("Draw in this round! ");
}
else if (Jie = = 1 | | jie = =-2)
{
Console.WriteLine ("This round wins!") ");
}
Else
{
Console.WriteLine ("This round fails! ");
}
}
Else
{
Console.WriteLine ("Wrong input! ");
}

Console.ReadLine ();


If an error occurs during the input process
for (int i = 1; i > 0; i++)
{
Console.Write ("Please enter Yes or no!") ");
string ss = Console.ReadLine ();
if (ss = = "Yes" | | ss = = "Not")
{
Break
}
Else
{
Console.WriteLine ("Wrong input! Please re-enter! ");
}
}
Enter month and day to see if the time and date format is correct

for (int i = 1; i > 0; i++)
{
Console.Write ("Please enter the Year:");
int year = Int. Parse (Console.ReadLine ());
if (year >= 0 && year <= 9999)
{
for (int a = 1; a > 0; a++)
{
Console.Write ("Please enter the month:");
int month = Int. Parse (Console.ReadLine ());
if (month >= 1 && month <= 12)
{
for (int b = 1; b > 0; b++)
{
Console.Write ("Please enter Date:");
int day = Int. Parse (Console.ReadLine ());
if (Day >= 1 && Day <= 31)
{
if (month = = 1 | | month = = 3 | | month = = 5 | | month = = 7 | | month = 8 | | month = = | | month = = 12)
{
Console.WriteLine ("The date you entered is correctly formatted, the date you entered is: {0} years {1} month {2} days", year, month, day);
Break
}
Else
{
if (month = = 4 | | month = = 6 | | month = = 9 | | month = = 11)
{
if (day = = 31)
{
Console.WriteLine ("You entered the wrong date, please re-enter!") ");
Continue
}
Else
{
Console.WriteLine ("The date you entered is correctly formatted, the date you entered is: {0} years {1} month {2} days", year, month, day);
Break
}
}
Else
{
if (Day <= 28)
{
Console.WriteLine ("The date you entered is correctly formatted, the date you entered is: {0} years {1} month {2} days", year, month, day);
Break
}
Else
{
if (year% 4 = = 0 && year%!! = 0 | | year% 400 = = 0)
{
if (day = = 29)
{
Console.WriteLine ("The date you entered is correctly formatted, the date you entered is: {0} years {1} month {2} days", year, month, day);
Break
}
Else
{
Console.WriteLine ("You entered the wrong date, please re-enter!") ");
Continue
}
}
Else
{
Console.WriteLine ("You entered the wrong date, please re-enter!") ");
Continue
}
}
}
}
}
Else
{
Console.WriteLine ("You entered the wrong date, please re-enter!") ");
Continue
}
}
A = -10;//jumps out

}
Else
{
Console.WriteLine ("You entered the month error, please re-enter!") ");
Continue
}
}
}
Else
{
Console.WriteLine ("You entered the year error, please re-enter!") ");
Continue
}
i =-10; Jump
}console.readline ();

8.1 Functions

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

Tags Index: