import java.util.Scanner;
public class DRYeck {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in); //declaration scanner
System.out.println("What is given:");
System.out.print("How many sides?"); //input the number of Sides that are given
System.out.println("");
double input = scanner.nextInt();
System.out.print("How many angles? "); //input the number of Angles that are given
System.out.println("");
double input2 = scanner.nextInt();
if((input+input2)>3){ //observes if the input is higher than 3 and errors if this is so
System.out.println("Please enter only 3 entries, you entered "+((int)(input+input2))+" eingegeben...");
}else if((input==1) && (input2==2)){
double side1 = inputDialogSide(); //input a Side
double angle1 = inputDialogAngle(); //input an Angle
double angle2 = inputDialogAngle(); //input an Angle
oneSideTwoAnglesGeneral(side1,angle1,angle2);
}else if((input==2) && (input2==1)){
System.out.println("Is the angle inclsive or exclusiv?");
String input3 = scanner.nextLine(); //input 3 for identification if the angle is inclusive or exclusive
if(input3.equals("inklusiv")){ //set variable 'inclu' to true if 'inclusive' is entered
//distinction of cases into inclusive and exclusive angle
double side1 = inputDialogSide(); //input one Side
System.out.println("");
double side2 = inputDialogSide(); //input the other Side
System.out.println("");
double angle1 = inputDialogAngle(); //input the Angle
twoSidesOneAngleIncl(side1,side2,angle1);
}else{
double side1 = inputDialogSide(); //input one Side
double side2 = inputDialogSide(); //input the other Side
double angle1 = inputDialogAngle(); //input the Angle
twoSidesOneAngleExcl(side1,side2,angle1);
}
}else if((input==3) && (input2==0)){ //condition if 3 Sides are inputed
double side1 = inputDialogSide(); //input first Side
double side2 = inputDialogSide(); //input second Side
double side3 = inputDialogSide(); //input third Side
threeSides(side1,side2,side3);
}
}
public static double inputDialogAngle(){ //subroutine for inputing an Angle
Scanner scanner = new Scanner(System.in);
System.out.print("Enter an angle: ");
double input5 = scanner.nextDouble(); //input5(variable) for an Angle
System.out.println("");
return input5;
}
public static double inputDialogSide(){ //subroutine for inputing a Side
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the sidelength: ");
double input4 = scanner.nextDouble(); //input4(variable) for a Side
System.out.println("");
return input4;
}
static void collection(double alpha,double beta, double gamma,double sidea,double sideb,double sidec){ //sorting the value in the array
double[][] SidesAngles = new double [3][2]; //array for side length value of the angles
for(int i=0;i<SidesAngles.length;i++){
for(int j=0;j<SidesAngles[i].length;j++){
if((SidesAngles[0][0]==0)){
SidesAngles[0][0]=sidea;
}else if((SidesAngles[0][1]==0)){
SidesAngles[0][1]=alpha;
}else if((SidesAngles[1][0]==0)){
SidesAngles[1][0]=sideb;
}else if((SidesAngles[1][1]==0)){
SidesAngles[1][1]=beta;
}else if((SidesAngles[2][0]==0)){
SidesAngles[2][0]=sidec;
}else if((SidesAngles[2][1]==0)){
SidesAngles[2][1]=gamma;
}
}
}
PrintArray(SidesAngles);
}
public static double angleDiff(double angle1, double angle2){
double resuAng = 180-angle1-angle2;
return resuAng;
}
static void PrintArray(double SidesAngles[][]){ //printing the Array with all values
String[][] AngleSideNames = {{"Seite a","Alpha"},{"Seite b","Beta"},{"Seite c","Gamma"}}; //Names of angles and Sides
for(int i=0;i<SidesAngles.length;i++){
for(int j=0;j<SidesAngles[i].length;j++){
System.out.print(AngleSideNames[i][j]+": "+SidesAngles[i][j]+"\n");
}
}
}
public static double sinusRule(double angle1, double angle2, double side){
double angle3 = angleDiff(angle1,angle2);
double resuSide = side*(Math.sin(angle1)/Math.sin(angle2));
return resuSide;
}
static void threeSides(double sidea, double sideb, double sidec){ //subroutine for 3 Sides that are given
double alpha = Math.acos((Math.pow(sidea, 2)+Math.pow(sideb, 2)-Math.pow(sidec, 2))/(2*sidea*sideb));
alpha = Math.toDegrees(alpha); //alpha in degree
double beta = Math.acos((Math.pow(sidea,2)+Math.pow(sidec,2)-Math.pow(sideb,2))/(2*sidea*sidec));
beta = Math.toDegrees(beta); //output in degree
double gamma = angleDiff(beta,alpha); //determine the angle differance
collection(alpha,beta,gamma,sidea,sideb,sidec);
}
static void twoSidesOneAngleIncl(double sidea, double sideb, double gamma){ //subroutine for 1 Angle(inclusive) and 2 Sides
double sidec = Math.sqrt(Math.pow(sidea,2)+Math.pow(sideb,2)-(2*sidea*sideb*Math.cos(gamma)));
double alpha = Math.acos((Math.pow(sideb,2)+Math.pow(sidec, 2)-Math.pow(sidea, 2))/(2*sideb*sidec));
double beta = angleDiff(alpha,gamma);
collection(alpha,beta,gamma,sidea,sideb,sidec);
}
static void twoSidesOneAngleExcl(double sideb, double sidec, double beta){ //subroutine for 1 Angle(exclusive) and 2 Sides
double sidea=0,alpha=0,gamma=0; //initialize sidea, alpha, gamma
double d = ((sidec/sideb)*Math.sin(beta)); //variable for further movement
boolean acute=false,obtuse=false; //initialize check-variable for acute or obtuse triangle
if(d>1){ //condition if check-variable is higher than 1
System.out.println("There is no solution for this triangle");
}else if(d==1){ //if check-variable equals 1
gamma = 90; //gamma=90° because of the conditions
sidea = Math.sqrt(Math.pow(sideb,2)+Math.pow(sidec,2)); //solve sidea with pythagorean theorem
}else{ //if check-variable is lower than
System.out.print("Is the traingle obtuse or actuse: ");
Scanner scanner = new Scanner(System.in); //input for acute or obtuse statement
String input = scanner.nextLine();
if(input.equals("obtuse")){ //sets the right boolean to true so further operations are correct
acute = true;
}else if(input.equals("acute")){
obtuse = true;
}
if((sideb<sidec) && (acute)){ //checks if b<c and the triangle should be acute
gamma = Math.asin(d);
System.out.println("angle gamma: "+gamma);
sidea = sinusRule(beta,gamma,sideb); //Side a
}else if((sideb<sidec) && (obtuse)){ //checks if b<c and the triangle should be obtuse
gamma = Math.asin(d);
gamma = 180-gamma;
System.out.println("angle gamma: "+gamma);
sidea = sinusRule(beta,gamma,sideb); //Side a
}
System.out.println("There is no solution!!!");
}
collection(alpha,beta,gamma,sidea,sideb,sidec);
}
static void oneSideTwoAnglesGeneral(double sidec, double alpha, double beta){//subroutine for one side and two angles that are given
double gamma = angleDiff(alpha,beta); //determine the third angle
double sidea = sidec*(Math.sin(alpha)/Math.sin(gamma)); //determine side with the law of sinus
sinusRule(alpha,gamma,sidec);
double sideb = sidec*(Math.sin(beta)/Math.sin(gamma)); //same here to determine side b
sinusRule(beta,gamma,sidec);
collection(alpha,beta,gamma,sidea,sideb,sidec);
}
}
例外：
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextDouble(Unknown Source)
at DRYeck.inputDialogSide(DRYeck.java:85)
at DRYeck.main(DRYeck.java:52)`
我的问题现在是如何摆脱异常。 本程序用于计算仅有3个输入的三角形的所有边和角度。例如一个角度和两个侧面或2个角度和1个侧面等等。
答案 0 :(得分：1)
您的问题与代码的这一部分有关：
class ComputationConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
int result = 0;
ListView lv = parameter as ListView;
Console.WriteLine(lv.Items);
foreach (var item in lv.Items)
{
result += (int)item;
}
return result;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
由于您不是在此处请求完整行，而只是请求令牌，因此请使用Scanner.next（）而不是Scanner.nextLine（）;
public String next（） 查找并返回此扫描程序中的下一个完整令牌。在完成令牌之前和之后是与分隔符模式匹配的输入。即使之前的hasNext（）调用返回true，此方法也可能在等待输入扫描时阻塞。
所以改变这一行：
public partial class MainWindow : Window
{
public ObservableCollection<int> numbers { get; set; }
public MainWindow()
{
InitializeComponent();
numbers = new ObservableCollection<int>();
this.DataContext = this;
}
private void btnAddNumber_Click(object sender, RoutedEventArgs e)
{
if (!string.IsNullOrEmpty(tbNewNumber.Text))
{
numbers.Add(int.Parse(tbNewNumber.Text));
}
}
}
到
else if((input==2) && (input2==1)){
System.out.println("Is the angle inklsiv or exclusiv?");
String input3 = scanner.nextLine(); //input 3 for identification if the angle is inclusive or exclusive
if(input3.equals("inklusiv")){
你的程序应该可以正常工作！
答案 1 :(得分：0)
我认为这里有一个问题：
double input = scanner.nextInt();
将其更改为此以及所有其他出现：
double input = scanner.nextDouble();