我正在尝试编写一个程序,询问用户是否要输入实数。如果是,则提示用户输入数字。不断提示输入数字,直到用户说“否”。一旦发生这种情况,请输出输入数字的平均值。
我认为我一直在尝试为哨兵值实现字符串。我希望哨兵值是“否”。但是,这是我的最后一次尝试,当我输入“是”时,我得到一个InputMismatchException。另外,不确定这是做某项工作的时间/时间或时间。所有这些都是新事物,不确定如何去做,因为我们没有使用字符串作为前哨的示例。
public static void main(String[] args) {
int count = 0;
float total = 0;
float inputNumber;
Scanner scan = new Scanner ( System.in );
System.out.println("Want to enter a number?");
String reply = "";
inputNumber = scan.nextFloat();
do {
reply = scan.nextLine();
if (reply.equalsIgnoreCase("yes")) {
System.out.println("Enter a number > ");
total+= inputNumber ;
count++ ;
System.out.println("Enter another number, or " +
"enter \"no\" to terminate > " );
inputNumber = scan.nextFloat();
}
}
while (! reply.equalsIgnoreCase("no")) ;
if (count != 0) {
System.out.println("The average of the numbers is " +
(total / count));
}
}
}
答案 0 :(得分:0)
inputNumber = scan.nextFloat();
scan.nextLine()
之后添加scan.nextFloat()
public static void main(String[] args) {
int count = 0;
float total = 0f;
float inputNumber = 0f;
Scanner scan = new Scanner ( System.in );
System.out.println("Want to enter a number?");
String reply = scan.nextLine();
while (reply.equalsIgnoreCase("yes")) {
System.out.println("Enter a number > ");
inputNumber = scan.nextFloat();
scan.nextLine();
total += inputNumber;
count++;
System.out.println("Enter another number, or enter \"no\" to terminate > ");
reply = scan.nextLine();
}
if (count != 0) {
System.out.println("The average of the numbers is " + (total / count));
}
}
public static void main(String[] args) {
int count = 0;
float total = 0f;
float inputNumber = 0f;
Scanner scan = new Scanner ( System.in );
System.out.println("Want to enter a number?");
String reply = scan.nextLine();
if (!reply.equalsIgnoreCase("yes"))
return;
System.out.println("Enter a number > ");
while (!reply.equalsIgnoreCase("no")) {
reply = scan.nextLine();
try {
inputNumber = Float.parseFloat(reply);
} catch (NumberFormatException e) {
continue;
}
total += inputNumber;
count++;
System.out.println("Enter another number, or enter \"no\" to terminate > ");
}
if (count != 0) {
System.out.println("The average of the numbers is " + (total / count));
}
}