Java 我怎样才能摆脱不断犯下的错误?
我不知道是什么地方出了问题,为什么它不能运行。我已经在这里玩了好几个小时了,我真的很想得到一些帮助。这是我在《编程入门》课上的一个学校项目。非常感谢 所以基本上这就是应该发生的事情。你输入你的账单,支付小费的金额。之后会弹出一条消息,告诉你小费的百分比,并给出一条关于小费的小消息。每次尝试修复错误时,我都会收到不同的错误消息,另一条消息会出现Java 我怎样才能摆脱不断犯下的错误?,java,Java,我不知道是什么地方出了问题,为什么它不能运行。我已经在这里玩了好几个小时了,我真的很想得到一些帮助。这是我在《编程入门》课上的一个学校项目。非常感谢 所以基本上这就是应该发生的事情。你输入你的账单,支付小费的金额。之后会弹出一条消息,告诉你小费的百分比,并给出一条关于小费的小消息。每次尝试修复错误时,我都会收到不同的错误消息,另一条消息会出现 public static void main(String[] args) { String input1 = JOptionPane.show
public static void main(String[] args) {
String input1 = JOptionPane.showInputDialog (null,
"Enter the Total Bill");
double bill = Double.parseDouble(input1);
String input2 = JOptionPane.showInputDialog(null,
"How much tip did you leave?");
double tipAmount = Double.parseDouble(input2);
double tipPercent = (tipAmount / bill);
if (tipPercent < 0 || tipPercent > 1) {
System.out.println("I don't think that's that correct. ");
} else if (tipPercent >= 0 || tipPercent <= 0.05 ) {
System.out.println("You left a " + tipPercent * 100 "% tip. "
+ "\nBad sercice or enpty wallet? ");
} else if (tipPercent > 0.05 && tipPercent <= 0.1 ) {
System.out.println("You left a " + tipPercent * 100 "% tip. "
+ "\nI think you could have done better");
} else if (tipPercent > 0.1 && tipPercent <= 0.2 ) {
System.out.println("You left a " + tipPercent * 100 "% tip. "
+ "\nNot too bad.";
} else if (tipPercent > 0.2 && tipPercent <= 0.3 ) {
System.out.println("You left a " + tipPercent * 100 "% tip. "
+ "\nSomeone's a bit generous.";
} else if (tipPercent > 0.3 ) {
System.out.println("You left a " + tipPercent * 100 "% tip. "
+ "\nBIG MONEY!!.";
JOptionPane.showMessageDialog(null, message);
}
}
publicstaticvoidmain(字符串[]args){
字符串input1=JOptionPane.showInputDialog(null,
“输入账单总额”);
双账单=double.parseDouble(输入1);
字符串input2=JOptionPane.showInputDialog(null,
“你留了多少小费?”;
double tipAmount=double.parseDouble(input2);
双倾卸器=(tipAmount/bill);
如果(Tipercent<0 | | Tipercent>1){
System.out.println(“我认为这不对。”);
}否则如果(Tipercent>=0 | | Tipercent 0.05和&Tipercent 0.1和&Tipercent 0.2和&Tipercent 0.3){
System.out.println(“您留下了一个“+tipercent*100”%tip。“
+“\n大钱!!。”;
showMessageDialog(空,消息);
}
}
您有两个主要问题:
System.out.println
语句缺少结束)代码>
public static void main(String[] args) {
String input1 = JOptionPane.showInputDialog (null,
"Enter the Total Bill");
double bill = Double.parseDouble(input1);
String input2 = JOptionPane.showInputDialog(null,
"How much tip did you leave?");
double tipAmount = Double.parseDouble(input2);
double tipPercent = (tipAmount / bill);
String message = getMessage(tipPercent); // you were missing message variable
System.out.println(message);
JOptionPane.showMessageDialog(null, message);
}
private static String getMessage(double tipPercent) {
if (tipPercent < 0 || tipPercent > 1) {
return "I don't think that's that correct. ";
} else if (tipPercent >= 0 || tipPercent <= 0.05 ) {
return "You left a " + tipPercent * 100 +"% tip. "
+ "\nBad sercice or enpty wallet? ";
} else if (tipPercent > 0.05 && tipPercent <= 0.1 ) {
return "You left a " + tipPercent * 100 +"% tip. "
+ "\nI think you could have done better";
} else if (tipPercent > 0.1 && tipPercent <= 0.2 ) {
return "You left a " + tipPercent * 100 +"% tip. "
+ "\nNot too bad.";
} else if (tipPercent > 0.2 && tipPercent <= 0.3 ) {
return "You left a " + tipPercent * 100 +"% tip. "
+ "\nSomeone's a bit generous.";
} else if (tipPercent > 0.3 ) {
return "You left a " + tipPercent * 100 +"% tip. "
+ "\nBIG MONEY!!.";
}
return "Ooops!!"; // edge case, when no if-else statement matches
}
publicstaticvoidmain(字符串[]args){
字符串input1=JOptionPane.showInputDialog(null,
“输入账单总额”);
双账单=double.parseDouble(输入1);
字符串input2=JOptionPane.showInputDialog(null,
“你留了多少小费?”;
double tipAmount=double.parseDouble(input2);
双倾卸器=(tipAmount/bill);
String message=getMessage(tipPercent);//缺少消息变量
System.out.println(消息);
showMessageDialog(空,消息);
}
私有静态字符串getMessage(双tipPercent){
如果(Tipercent<0 | | Tipercent>1){
return“我认为这不对。”;
}否则如果(Tipercent>=0 | | Tipercent 0.05和&Tipercent 0.1和&Tipercent 0.2和&Tipercent 0.3){
return“您留下了一个”+tipPercent*100+%tip。“
+“\n大钱!!。”;
}
返回“Ooops!!”;//如果没有if-else语句匹配,则返回边缘大小写
}
欢迎来到Stack Overflow,谢谢您的提问。如果您能告诉我们您收到的确切错误消息,那将非常有帮助。您留下了“+tipercent*100”%tip。“
这是无效的语法。。。。可能您的意思是:“您留下了一个“+(tipercent*100)+%tip。”
如果您添加完整的错误消息,这将非常有用。人类不是编译器,没有信息很难发现问题。我真的很感激。我想不出来,但你们都帮了大忙。如果这个答案适合你,你没有问题了,请接受答案或结束这个问题。