I take a class Set A class that will keep an array in the constructor of class we initialize the array and make two objects of that array and like
I need that at + operator the union of two array should come
guide me .and at operator parameter a and b it is giving error also
public class seta
{
public seta(int size)
{
this.size = Size;
int[] array = new int[size]
}
private int size;
public int Size
{
get { return size; }
set { size = value; }
}
Console.WriteLine ("enter size of an array aray");`
`
int a = Convert.ToInt32(Console.ReadLine());
seta obja = new seta(a);
Console.WriteLine("enter size of an array aray");
int b = Convert.ToInt32(Console.ReadLine());
seta objb = new seta(b);
}
public static double operator + ( a , b )
{
}
This code will create two random arrays stored in class SetA { } and then find the union with the operator +. Under the hood it just calls Enumerable.Union()
public class SetA
{
static Random rng = new Random();
int[] data;
public SetA(int[] data)
{
this.data=data;
}
public SetA(int size)
{
this.data=new int[size];
for (int i = 0; i<data.Length; i++)
{
data[i]=rng.Next(0, 100);
}
}
public int Size { get { return data.Length; } }
public int[] Data { get { return data; } }
public static SetA operator +(SetA a, SetA b)
{
return new SetA(a.data.Union(b.data).ToArray());
}
}
class Program
{
static void Main(string[] args)
{
SetA a = new SetA(100);
SetA b = new SetA(50);
SetA c = a+b;
int n = c.Size;
}
}
Related
I Wrote a class which allows users to set a bottom bound of array, in instance "myArray(-5, 10)" where -5 start index and 10 length of array. But I am getting an error when I compare i <= myArray.GetArrayLength. What I did wrong. I will appriciated any help.
using System;
namespace UsArrClass
{
class Program
{
class UserArr
{
private int[] _UsArr;
private int _start;
private int _len;
public int[] UsArr
{
get => this._UsArr;
set => this._UsArr = value;
}
public int BotomBoundary
{
get => this._start;
set => this._start = value;
}
public int TopBoundary => (GetUserArrLength -1) + BotomBoundary;
public int GetUserArrLength => _len;
public UserArr(int start, int len)
{
this.BotomBoundary = start;
this._len = len;
UsArr = new int [len];
}
public int this[int n]
{
get => UsArr[n - BotomBoundary];
set => UsArr[n - BotomBoundary] = value;
}
static void Main(string[] args)
{
UserArr myarr = new UserArr( 0, 3);
for (int i = myarr.BotomBoundary; i <= myarr.GetUserArrLength; i++)
{
myarr[i] = i;
Console.Write(" "+ myarr[i]);
}
Console.WriteLine();
Console.WriteLine(myarr.TopBoundary);
Console.WriteLine(myarr[1]);
Console.WriteLine(myarr.BotomBoundary);
Console.WriteLine(myarr.GetUserArrLength);
}
}
}
}
I have simple code, where I want to fill my SortedList with some data from arrays.
namespace Test
{
class TestClass
{
public int ValueInt { get; set; }
public char ValueChar { get; set; }
}
class MainClass
{
public static void Main(string[] args)
{
int[] arr1 = { 1, 2, 3 };
char[] arr2 = { 'a', 'b', 'c' };
SortedList<TestClass, char> list = new SortedList<TestClass, char>();
for (int i = 0; i < 3; i++)
{
list.Add(new TestClass() { ValueInt = arr1[i], ValueChar = arr2[i]}, '+');
}
foreach (KeyValuePair<TestClass, char> kvp in list)
{
Console.WriteLine(
"Key1 = {0}, Key2 = {1}, Value = {2}",
kvp.Key.ValueInt, kvp.Key.ValueChar, kvp.Value
);
}
}
}
}
Program throw error:
System.InvalidOperationException (Failed to compare two elements in the array)
Program throw it at the point of second iteration of that loop:
list.Add(new TestClass() { ValueInt = arr1[i], ValueChar = arr2[i]}, '+');
HOWEVER,
Program works if I change SortedList to Dictionary
How can I make my Program works with the SortedList ?
TestClass should implement IComparable-interface.
SortedList requires a comparer implementation to sort and
to perform comparisons
(see MS docs)
class TestClass : IComparable<TestClass>
{
public int ValueInt { get; set; }
public char ValueChar { get; set; }
public int CompareTo(TestClass other)
{
if (ReferenceEquals(this, other)) return 0;
if (ReferenceEquals(null, other)) return 1;
var valueIntComparison = ValueInt.CompareTo(other.ValueInt);
if (valueIntComparison != 0) return valueIntComparison;
return ValueChar.CompareTo(other.ValueChar);
}
}
Protobuf doesn't support multi-dim arrays so I decided to use this implementation to make a 1D array out of a 2D one.
I get a Cannot cast from source type to destination type in the ToProtoArray method when I call the MultiLoop function. Any ideas on how to fix this?
public static ProtoArray<T> ToProtoArray<T>(this System.Array array)
{
// Copy dimensions (to be used for reconstruction).
var dims = new int[array.Rank];
for (int i = 0; i < array.Rank; i++) dims[i] = array.GetLength(i);
// Copy the underlying data.
var data = new T[array.Length];
var k = 0;
array.MultiLoop(indices => data[k++] = (T)array.GetValue(indices));
// ^^^^^^^^^^ cannot cast from source type to destination type
return new ProtoArray<T> { Dimensions = dims, Data = data };
}
public static System.Array ToArray<T>(this ProtoArray<T> protoArray)
{
// Initialize array dynamically.
var result = System.Array.CreateInstance(typeof(T), protoArray.Dimensions);
// Copy the underlying data.
var k = 0;
result.MultiLoop(indices => result.SetValue(protoArray.Data[k++], indices));
return result;
}
public static void MultiLoop(this System.Array array, System.Action<int[]> action)
{
array.RecursiveLoop(0, new int[array.Rank], action);
}
private static void RecursiveLoop(this System.Array array, int level, int[] indices, System.Action<int[]> action)
{
if (level == array.Rank)
{
action(indices);
}
else
{
for (indices[level] = 0; indices[level] < array.GetLength(level); indices[level]++)
{
RecursiveLoop(array, level + 1, indices, action);
}
}
}
[ProtoContract]
public class ProtoArray<T>
{
[ProtoMember(1)]
public int[] Dimensions { get; set; }
[ProtoMember(2)]
public T[] Data { get; set; }
}
Here's how I use this to serialize a 2D array:
[ProtoContract]
public class Tile
{
[ProtoMember(1)]
public int x;
[ProtoMember(2)]
public int y;
// ...
}
Tile[,] map; // meanwhile I assign the data to the array
map1d = Extensions.ToProtoArray<Tile[,]>(map);
using (var file = File.Create(path))
{
Serializer.Serialize(file, map1d);
}
I think this is what you need:
public class ProtoArray<T>
{
public ProtoArray(T[] array)
{
this.Data=array;
this.Dimensions=new int[array.Length];
}
public ProtoArray(T[,] array)
{
int n = array.GetLength(0);
int m = array.GetLength(1);
this.Data=new T[n*m];
for(int i = 0; i<n; i++)
{
for(int j = 0; j<m; j++)
{
// Row Major
Data[i*m+j]=array[i, j];
// For Column Major use Data[i+j*n]=array[i, j];
}
}
this.Dimensions=new[] { n, m };
}
public int[] Dimensions { get; set; }
public T[] Data { get; set; }
public T[] ToArray()
{
if(Dimensions.Length==1)
{
return Data.Clone() as T[];
}
else
{
throw new NotSupportedException();
}
}
public T[,] ToArray2()
{
if(Dimensions.Length==2)
{
int n = Dimensions[0], m = Dimensions[1];
T[,] array = new T[n, m];
for(int i = 0; i<n; i++)
{
for(int j = 0; j<m; j++)
{
array[i, j]=Data[i*m+j];
}
}
return array;
}
else
{
throw new NotSupportedException();
}
}
}
public class Tile
{
public int x;
public int y;
// ...
}
class Program
{
static void Main(string[] args)
{
Tile[,] map = new Tile[16, 4];
ProtoArray<Tile> array = new ProtoArray<Tile>(map);
//serialize array
//
// de-serialize array
Tile[,] serialized_map = array.ToArray2();
}
}
I am having difficulties setting the values of certain variables. In my GameController class I want the user to input the number of players. I then want my code to create an array that will hold scores for each of the players.
class Program
{
static void Main(string[] args)
{
Game GC = new Game();
GC.GetNumberPlayers();
GC.SetInitialScores();
}
}
class Game
{
private int players;
private int[] scores;
private string[] playerNames;
public int Players
{
get { return players; }
set { players = value; ; }
}
public int[] Scores
{
get { return scores; }
set { scores = value; }
}
public int GetNumberPlayers()
{
string playersString;
Console.WriteLine("Enter number of players");
playersString = Console.ReadLine();
Int32.TryParse(playersString, out players);
return players;
}
public int[] SetInitialScores()
{
for (int i = 0; i < players; i++ )
{
scores[i] = 0;
}
return scores;
}
}
A few things:
GetNumberPlayers returns an integer, you are not doing anything with it due to calling it as GC.GetNumberPlayers();
If you wanted to have the value of GetNumberPlayers(), you would need to call it like int numPlayers = GC.GetNumberPlayers();
Since you are setting players value in your try parse, there is not really any reason to return it since you're using it only internally (or if you were using it externally by assigning it to a variable as in above)
The same holds true for your function SetInitialScores, with an additional problem. Arrays need their length to be declared as a part of their initialization. You are not initializing the array at all, and are thus running into a run time error. You could initialize the array based on the value entered in players like this:
public void SetInitialScores()
{
scores = new int[players];
for (int i = 0; i < players; i++ )
{
scores[i] = 0;
}
}
Here's a Fiddle demonstrating: https://dotnetfiddle.net/JmHsLQ
and the fully modified code:
public class Program
{
public static void Main(string[] args)
{
Game GC = new Game();
var players = GC.GetNumberPlayers();
var scores = GC.SetInitialScores();
Console.WriteLine("You entered {0} players!", players);
Console.WriteLine("Printing scores");
foreach (int val in scores)
{
Console.WriteLine(val);
}
}
}
public class Game
{
private int players = 0;
private int[] scores;
private string[] playerNames;
public int Players
{
get { return players; }
set { players = value; ; }
}
public int[] Scores
{
get { return scores; }
set { scores = value; }
}
public int GetNumberPlayers()
{
string playersString;
Console.WriteLine("Enter number of players");
playersString = Console.ReadLine();
Int32.TryParse(playersString, out players);
return players;
}
public int[] SetInitialScores()
{
scores = new int[players];
for (int i = 0; i < players; i++ )
{
scores[i] = 0;
}
return scores;
}
}
i need to call variables that are defined in a class
class testclasss
{
public testclass(double[,] values)
{
double[][] rawData = new double[10][];
for (int i = 0; i < 10; i++)
{
rawData[i] = new double[] { values[i, 2], stockvalues[i, 0] }; // if data won't fit into memory, stream through external storage
}
int num = 3;
int max = 30;
}
public int[] checkvalue(double[][] rawData, int num, int maxCount)
{
............
}
}
I have called constructor using
testclass newk = new testclass(values);
now how can i call the function checkvalues(). i tried using newk.num,newk.maxcount but those variables were not recognized.
Just as your class constructor and checkvalues function are public, so too must the properties you wish to access from outside the class. Put these at the top of your class declaration:
public int num {get; set;}
public int max {get; set;}
Then you can access them via newk.num and newk.max.
EDIT: In response to your second comment, I think you might be a bit confused about how functions and properties interact within the same class. This might help:
class TestClass {
private int _num;
private int _max;
private double[][] _rawData;
public TestClass(double[,] values, int num, int max)
{
_num = num;
_max = max;
_rawData = new double[10][];
for (int i = 0; i < 10; i++)
{
_rawData[i] = new double[] { values[i, 2], stockvalues[i, 0] };
}
}
public int[] CheckValues()
{
//Because _num _max and _rawData exist in TestClass, CheckValues() can access them.
//There's no need to pass them into the function - it already knows about them.
//Do some calculations on _num, _max, _rawData.
return Something;
}
}
Then, do this (for example, I don't know what numbers you're actually using):
double[,] values = new double[10,10];
int num = 3;
int max = 30;
Testclass foo = new Testclass(values, num, max);
int[] results = foo.CheckValues();
I believe this is what you're looking for:
class TestClass {
public int num { get; set; }
public int max { get; set; }
public double[][] rawData;
public TestClass(double[,] values)
{
rawData = new double[10][];
for (int i = 0; i < 10; i++)
{
rawData[i] = new double[] { values[i, 2], stockvalues[i, 0] }; // if data won't fit into memory, stream through external storage
}
this.num = 3;
this.max = 30;
}
public int[] CheckValue()
{............}
}
You'll need a property with a get accessor.
Here is a simplified example based on your code:
class testclass
{
private int _num = 0;
private int _max = 0;
public int Num
{
set { _num = value; }
get { return _num; }
}
public int Max
{
set { _max = value; }
get { return _max; }
}
public testclass()
{
Num = 3;
Max = 30;
}
}
//To access Num or Max from a different class:
testclass test = new testclass(null);
Console.WriteLine(test.Num);
Hope that helps.
Using your exact same code, except for public testclass(double[,] values), which I changed to public testfunction(double[,] values)
class testclass
{
public testfunction(double[,] values)
{
double[][] rawData = new double[10][];
for (int i = 0; i < 10; i++)
{
rawData[i] = new double[] { values[i, 2], stockvalues[i, 0] }; // if data won't fit into memory, stream through external storage
}
int num = 3;
int max = 30;
}
public int[] checkvalue(double[][] rawData, int num, int maxCount)
{
............
}
}
Have you tried calling checkvalues() function like this?
testclass.checkvalue();