首頁猿問請?jiān)徫沂莻€(gè)菜鳥，求幫助

請?jiān)徫沂莻€(gè)菜鳥，求幫助

C#

眼眸繁星 2023-01-11 15:15:50

namespace shiyan3_2{public partial class Form4 : Form{public Form4(){InitializeComponent();}private void Form4_Load(object sender, EventArgs e){Book[] book = new Book[10];book[0] = new Book("chinese", "me", 21, 2,30 );book[1] = new Book("english", "you", 28, 3, 40);}private void button2_Click(object sender, EventArgs e){Form4 f = new Form4(); }public class Book{string title;string author;int price;int store;int sellprice;public Book(){}public Book(string ti,string au,int pr,int st,int se){title = ti;author = au;price = pr;store = st;sellprice = se;}}}如何在button_click中調(diào)用book【0】呢？看到一些人說不能調(diào)用的，如果不能調(diào)用那數(shù)組不就是廢了

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2 回答

慕運(yùn)維8079593

TA貢獻(xiàn)1876條經(jīng)驗(yàn) 獲得超5個(gè)贊

namespace shiyan3_2
{
public partial class Form4 : Form
{
//如果你想在Form4以外的地方調(diào)用那就聲明為public 變量或public的屬性。
Book[] book = new Book[10];
public Form4()
{
InitializeComponent();
}

private void Form4_Load(object sender, EventArgs e)
{
book[0] = new Book("chinese", "me", 21, 2,30 );
book[1] = new Book("english", "you", 28, 3, 40);
}

反對回復(fù) 2023-01-15

慕標(biāo)琳琳

TA貢獻(xiàn)1830條經(jīng)驗(yàn) 獲得超9個(gè)贊

namespace shiyan3_2
{
public partial class Form4 : Form
{
Book[] book;
public Form4()
{
InitializeComponent();
}

private void Form4_Load(object sender, EventArgs e)
{
book = new Book[10];
book[0] = new Book("chinese", "me", 21, 2,30 );
book[1] = new Book("english", "you", 28, 3, 40);
}

private void button2_Click(object sender, EventArgs e)
{
Form4 f = new Form4();
var val = book[0];
}
public class Book
{
string title;
string author;
int price;
int store;
int sellprice;

public Book()
{
}

public Book(string ti,string au,int pr,int st,int se)
{
title = ti;
author = au;
price = pr;
store = st;
sellprice = se;
}
}
}