我的程序的一部分测试两个数是否相等。由于某些操作只能使用双打,而其他操作只能使用整数,所以我在比较整数和双精度。即使他们只有回合等于(即7.5=7
),两个程序仍然返回。我只想让程序返回true,如果两个实际上都是等于。我试过这里列出的解决方案:How to test if a double is an integer 以确定我的双打是否是整数。
所有这些似乎工作 - 他们编译,但程序仍然返回7=7.5
我试着去另一个方向也 - 将我的整数转换为双打 - 相同的结果。我如何让我的计划承认差异?与最新的建议:java测试如果double是int
import acm.program.ConsoleProgram;
import java.awt.Color;
import acm.io.IODialog;
import java.text.*;
import static java.lang.Math.*;
import java.util.*;
/** Tests to see if user color matches sample colors */
public class ColorMatch extends ConsoleProgram
{
//defining sample colors
Color[] dmc =
{
new Color(255,255,255),
new Color(43,57,41),
new Color(213,39,86),
new Color(0,160,130),
new Color(0,0,0),
};
public void run()
{
average();
}
//averages three colors, then tests for match to given color
public void average()
{
//asks for stitch color
IODialog dialog = new IODialog();
int stitchRed = dialog.readInt("Enter red value: ");
int stitchGreen = dialog.readInt("Enter green value: ");
int stitchBlue = dialog.readInt("Enter blue value: ");
Color stitchColor = new Color(stitchRed,stitchGreen,stitchBlue);
//gets averages for dmc colors
for (Color i:dmc)
{
for (Color j:dmc)
{
for (Color k:dmc)
{
int indexI = Arrays.asList(dmc).indexOf(i);
int indexJ = Arrays.asList(dmc).indexOf(j);
int indexK = Arrays.asList(dmc).indexOf(k);
if (indexI <= indexJ && indexJ <= indexK)
{
int iRed = i.getRed();
int jRed = j.getRed();
int kRed = k.getRed();
int iGreen = i.getGreen();
int jGreen = j.getGreen();
int kGreen = k.getGreen();
int iBlue = i.getBlue();
int jBlue = j.getBlue();
int kBlue = k.getBlue();
double redAverage = (iRed+jRed+kRed)/3;
double greenAverage = (iGreen+jGreen+kGreen)/3;
double blueAverage = (iBlue+jBlue+kBlue)/3;
if (redAverage == (int)redAverage && greenAverage == (int)greenAverage && blueAverage == (int)blueAverage)
{
int rAverage = (int)redAverage;
int gAverage = (int)greenAverage;
int bAverage = (int)blueAverage;
Color colorAverage = new Color(rAverage,gAverage,bAverage);
//tests to see if any average equals the stitch color
if (colorAverage.equals(stitchColor))
{
println("The color match is: " + i + ", " + j + ", " + k);
}
}
}
}
}
}
我插入85作为我的测试号码。
唯一的结果应该是(0,0,0)+(0,0,0)+(255,255,255)
,但它也产生(43,57,41)+(213,39,86)+(0,160,130) . (41+86+130)/3=85.7!=85
。
请发表[mcve]。 –
此外,请尝试使用双精度和整数来查看此问题:http://stackoverflow.com/q/9898512/5335355 – CShark