代码！确实动态地改变变量 [英] Code ! does changes variables dynamically
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问题描述
应更改变量a，b，c，d的代码，如果在a的提示值处输入a，则初始化为但b，c和d未初始化
public class BufferedReaderFromUserAnd
{
private static final String FILENAME = F： /Android.txt;
public static void main（ String args []） throws IOException
{
BufferedWriter bw = null;
FileWriter fw = null;
尝试
{
fw = new FileWriter （文件名）;
bw = new BufferedWriter（fw）;
BufferedReader reader = new BufferedReader（ new InputStreamReader（System.in）） ;
System.out.print（ Word1：）;
String Word1 = reader.readLine（）;
System.out.print（ Word2：）;
String Word2 = reader.readLine（）;
System.out.print（ Word3：）;
String Word3 = reader.readLine（）;
System.out.print（ Word4：）;
String Word4 = reader.readLine（）;
System.out.print（ Y：）;
String y = reader.readLine（）;
String a = reader.readLine（）;
String b = reader.readLine（）;
String c = reader.readLine（）;
String d = reader.readLine（）;
if （y.compareTo（a）== 0）
{
b = not;
c = not;
d = not;
}
if （y.compareTo（b）== 0）
{
a = < span class =code-string> not;
c = not;
d = not;
}
if （y.compareTo（c）== 0）
{
b = < span class =code-string> not;
a = not;
d = not;
}
如果（y.compareTo（d）== 0）
{
a = < span class =code-string> not;
c = not;
d = not;
}
字符串 n = reader.readLine（）;
bw.write（ < input type ='radio'name ='rbnNumber' value ='您选择了（a） + Word1 + 这是 + a + 正确答案'/>（a） + Word1 + < br />）;
bw.write（ < input type ='radio'name ='rbnNumber'value ='你选中（a） + Word2 + 这是 + b + 正确答案'/>（a） + Word2 + < br />）;
bw.write（ < input type ='radio'name ='rbnNumber'value ='你选中（a） + Word3 + 这是 + c + 正确答案'/>（a） + Word3 + < br />）;
bw.write（ < input type ='radio'name ='rbnNumber'value ='你选中（a） + Word4 + 这是 + d + 正确答案'/>（a） + Word4 + < br />）;
}
catch （IOException e）{
e.printStackTrace（）;
}
最后
{
尝试 {
if （bw！= null）
bw.close（）;
if （fw！= null）
fw.close（）;
}
catch （IOException ex）{
ex.printStackTrace（）;
}
}
}
}
如果在提示时输入a结果是
< 输入 类型 =' radio' name =' rbnNumber' 值 =' 您选择了（a）Android，这是正确答案' / > （a）Android < span class =code-keyword>< br / >
< 输入 类型 =' radio' 名称 =' rbnNumber' value =' 您选择了（a）CS，这是正确答案' / > （a）CS < br / >
< 输入 type =' radio' 名称 =' rbnNumber' value =' 您选择了（a）OS是正确答案' / > （a）OS < br / >
< input type =' radio' 名称 =' rbnNumber' value =' 您选择了（a）代码是正确答案' / > （a）代码< br / >
所需要的是：
< input type =' radio' name =' rbnNumber' 值 =' 您选择了（a）Android，这是正确答案' / > （a） Android < br / >
< 输入 type =' radio' 名称 =' rbnNumber' value =' 您选择了（a）CS，这不是正确答案' / > （a）CS < br / >
< span class =code-keyword>< input type =' radio' 名称 =' rbnNumber' value =' 您选择了（a）不是正确答案的操作系统 / > （a）操作系统< br / >
< input type = ' radio' name =' rbnNumber' value =' 您选择了（a）不正确答案的代码' / > （ a）代码< br / >
我的尝试：
搜索代码和Java类
解决方案
您不断重新发布此问题，尽管我们试图帮助您，但每次都会继续编写完全相同的错误。我建议你去 Java™教程 [ ^ ]并通过它们来正确理解您尝试使用的语言。
Code that should change variables a,b,c, d, if a is entered at prompt value of a is initialized to " " but b, c and d are not initialized
public class BufferedReaderFromUserAnd
{
private static final String FILENAME = "F:/Android.txt";
public static void main(String args[]) throws IOException
{
BufferedWriter bw = null;
FileWriter fw = null;
try
{
fw = new FileWriter(FILENAME);
bw = new BufferedWriter(fw);
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Word1: ");
String Word1 = reader.readLine();
System.out.print("Word2: ");
String Word2 = reader.readLine();
System.out.print("Word3: ");
String Word3 = reader.readLine();
System.out.print("Word4: ");
String Word4 = reader.readLine();
System.out.print("Y: ");
String y = reader.readLine();
String a = reader.readLine();
String b = reader.readLine();
String c = reader.readLine();
String d = reader.readLine();
if(y.compareTo(a)==0)
{
b = "not" ;
c = "not" ;
d = "not" ;
}
if(y.compareTo(b)==0)
{
a = "not" ;
c = "not" ;
d = "not" ;
}
if(y.compareTo(c)==0)
{
b = "not" ;
a = "not" ;
d = "not" ;
}
if(y.compareTo(d)==0)
{
a = "not" ;
c = "not" ;
d = "not" ;
}
String n = reader.readLine();
bw.write("<input type='radio' name='rbnNumber' value='You selected (a) " + Word1 + " which is " + a + " the correct answer' />(a) " + Word1 + "<br/>");
bw.write("<input type='radio' name='rbnNumber' value='You selected (a) " + Word2 + " which is " + b + " the correct answer' />(a) " + Word2 + "<br/>");
bw.write("<input type='radio' name='rbnNumber' value='You selected (a) " + Word3 + " which is " + c + " the correct answer' />(a) " + Word3 + "<br/>");
bw.write("<input type='radio' name='rbnNumber' value='You selected (a) " + Word4 + " which is " + d + " the correct answer' />(a) " + Word4 + "<br/>");
}
catch (IOException e) {
e.printStackTrace();
}
finally
{
try {
if (bw != null)
bw.close();
if (fw != null)
fw.close();
}
catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
if a is entered at prompt the result is
<input type='radio' name='rbnNumber' value='You selected (a) Android which is the correct answer' />(a) Android<br/>
<input type='radio' name='rbnNumber' value='You selected (a) CS which is the correct answer' />(a) CS<br/>
<input type='radio' name='rbnNumber' value='You selected (a) OS which is the correct answer' />(a) OS<br/>
<input type='radio' name='rbnNumber' value='You selected (a) Code which is the correct answer' />(a) Code<br/>
what is required is :
<input type='radio' name='rbnNumber' value='You selected (a) Android which is the correct answer' />(a) Android<br/>
<input type='radio' name='rbnNumber' value='You selected (a) CS which is not the correct answer' />(a) CS<br/>
<input type='radio' name='rbnNumber' value='You selected (a) OS which is not the correct answer' />(a) OS<br/>
<input type='radio' name='rbnNumber' value='You selected (a) Code which is not the correct answer' />(a) Code<br/>
What I have tried:
Searched Code and Java Classes
解决方案
You keep reposting this question, and despite our attempts to help you, you continue to code the exact same errors every time. I suggest you go to The Java™ Tutorials[^] and work through them to get a proper understanding of the language you are trying to use.
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