我有2个类DigitMath.java和DigitMathRunner.java,实验室要求的设置使用DigitMathRunner作为DigitMath的启动器。
我的代码的目的是显示“平均值”,然后将其输出到句子中。
编译器未给出错误,但输出如下。
> >
run DigitMathRunner
234 has a digit average of 0.0
10000 has a digit average of 0.0
111 has a digit average of 0.0
9005 has a digit average of 0.0
84645 has a digit average of 0.0
8547 has a digit average of 0.0
123456789 has a digit average of 0.0
>
这是DigitMath.java的代码
import static java.lang.System.*;
public class DigitMath
{
private int number;
private int count;
private int s;
private int sum;
private int input;
private double average;
public DigitMath()
{
number = 0;
sum=0;
count = 0;
input = 0;
}
public DigitMath(int s)
{
number = s;
input = s;
}
public void setNums(int s)
{
number = s;
input = s;
}
public int sumDigits()
{
int sum=0;
while(input > 0)
{
sum += input % 10;
input /= 10;
}
return sum;
}
public int countDigits()
{
count = (int)(Math.log10(number)+1);
return count;
}
public double averageDigits()
{
double average = sum/count;
return average;
}
public int output()
{
System.out.println(""+number +" has a digit average of "+""+average);
return number;
}
}
下一个代码块是Runner。
//Name - Seth Garcia
//Date - 5/12/16
//Class - 3rd Period Monaghan
//Lab - DigitMath
import static java.lang.System.*;
public class DigitMathRunner
{
public static void main( String args[] )
{
DigitMath test = new DigitMath();
test.setNums(234);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
test.setNums(10000);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
test.setNums(111);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
test.setNums(9005);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
test.setNums(84645);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
test.setNums(8547);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
test.setNums(123456789);
test.sumDigits();
test.countDigits();
test.averageDigits();
test.output();
}
}
我也是Highschool的Computer Science 1的学生,如果我的代码不好,请告诉我如何改进,谢谢。
最佳答案
可变阴影是您的问题。
double average = sum/count;
请删除
double
。和力浮点除法
average = sum/(double)count;
类似的问题在
sumDigits()
中此外,由于
private double average
是一个计算值,因此可以完全删除。public double averageDigits()
{
return sum/(double)count;
}
并在
output
方法而不是average
中使用该方法关于java - 我的平均值/输出返回了0.0,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/37188305/