basic basic basic of C#

[penguinlay]

ေက်းဇူးအမ်ားႀကီးတင္ပါတယ္။
ေရးႀကည့္ရတာ အရမ္းအဆင္ေျပပါတယ္။

[jeepstar]

အစ္ကိုေရ က်ြႏ္ေတာ္ အစ္ကိုေရးထားတဲ matrix program ကိုနားမလည္ဘူးအစ္ကို program မွာ second matiix ကို input ယူတဲအထိနားလည္တယ္ ေအာက္ပိုင္းကဟာေတြကိုသိပ္နားမလည္ဘူး.....ေနာက္ျ ပီး matrix နွစ္ခုေျမွာက္တဲ flow ေလးကိုလညး္ျဖစ္နိဳင္ရင္ရွင္းျပေပးပါေနာ္
ေက်းဇူးတင္စြာျဖင့္
jeepstar

multi-dimension array ဆိုတာကေတာ့ dimension တစ္ခုထက္ပိုပါတဲ႔ array လို႔ ဆိုလိုတာေပါ့ ။ dimension တစ္ခုစီကို ( , ) ေလးနဲ႔ ခံျပီးေရးေပးရပါတယ္။

    
int[,] arr = new int[3,2];

အခု ေၾကျငာလိုက္တဲ႔ array ေလးမွာ dimension ၂ ခုပါျပီး၊ ပထမ dimension မွာ ၃ ခန္း၊ ဒုတိယ dimension မွာ ၂ ခန္း၊ ယူသြားပါမယ္။
တန္ဖိုးထည့္မယ္ဆိုရင္…

    
   arr[0,0] = 1;
  arr[0,1] = 2;
  arr[1,0] = 3;
  arr[1,1] = 4;
  arr[2,0] = 5;
  arr[2,1] = 6;

multidimensional array ေတြကိုလည္း initialize လုပ္လို႔ရပါတယ္။ ဒီလိုမ်ိဳးပါ…

   int[,] arr = { {1,2} , {3,4} , {5,6} } ;

multidimensional array ေတြကို looping ပတ္မယ္ဆိုရင္ေတာ့ dimension အေရအတြက္ေပၚမူတည္ျပီး loopingေတြ ေရးရမွာပါ။

   for (int i = 0; i <= arr.GetUpperBound(0); i++)
  {
  for (int j = 0; j <= arr.GetUpperBound(1); j++)
                          Console.Write(arr[i, j]+" ");
  Console.WriteLine();
  }

GetUpperBound function ေလးက demension တစ္ခုရဲ႕ upperbound တန္ဖိုးကို return ျပန္ပါတယ္။ ဒါေၾကာင့္ ကိုယ္သိခ်င္တဲ႔ dimension index ေလးကို parameter ထည့္ေပးရပါတယ္။
အခုကြၽန္ေတာ္တို႔ matrix 2 ခု ေျမွာက္တဲ႔ program ေလး ေရးၾကည့္ရေအာင္။ နည္းနည္းေတာ့ ရွည္ျပီး ႐ႈပ္မယ္ထင္တယ္

        using System;
      class Program
      {
          static int GetInteger()
          {
              try
              {
                  return Convert.ToInt32(Console.ReadLine());
              }
              catch
              {
                  return 1;
              }
          }
          static void Main(string[] args)
          {
              int r1, r2, c1, c2;
              int[,] matrix1;
              int[,] matrix2;
              int[,] matrix3;
              Console.WriteLine("First Matrix\n************");
              Console.Write("row : ");
              r1 = GetInteger();
              Console.Write("col : ");
              c1 = GetInteger();
              matrix1 = new int[r1, c1];
  
              Console.WriteLine();
              Console.WriteLine("Second Matrix\n************");
              Console.Write("row : ");
              r2 = GetInteger();
              Console.Write("col : ");
              c2 = GetInteger();
              matrix2 = new int[r2, c2];
  
              if (!((r1 == 1 && c1 == 1) || (r2 == 1 && c2 == 1) || (c1 == r2)))
              {
                  Console.WriteLine("\nOut of result!");
                  Console.Read();
                  return;
              }
  
              Console.WriteLine();
              for (int i = 0; i <= matrix1.GetUpperBound(0); i++)
              {
                  for (int j = 0; j <= matrix1.GetUpperBound(1); j++)
                  {
                      Console.Write("Enter value for first matrix : row {0}, column {1} : ", i, j);
                      matrix1[i, j] = GetInteger();
                  }
              }
              Console.WriteLine();
              for (int i = 0; i <= matrix2.GetUpperBound(0); i++)
              {
                  for (int j = 0; j <= matrix2.GetUpperBound(1); j++)
                  {
                      Console.Write("Enter value for second matrix : row {0}, column {1} : ", i, j);
                      matrix2[i, j] = GetInteger();
                  }
              }
  
              if (c1 != r2)
              {
                  if (r1 == 1 && c1 == 1)
                  {
                      matrix3 = new int[r2, c2];
                      for (int i = 0; i <= matrix2.GetUpperBound(0); i++)
                          for (int j = 0; j <= matrix2.GetUpperBound(1); j++)
                              matrix3[i, j] = matrix2[i, j] * matrix1[0, 0];
                  }
                  else
                  {
                      matrix3 = new int[r1, c1];
                      for (int i = 0; i <= matrix1.GetUpperBound(0); i++)
                          for (int j = 0; j <= matrix1.GetUpperBound(1); j++)
                              matrix3[i, j] = matrix1[i, j] * matrix2[0, 0];
                  }
              }
              else
              {
                  matrix3 = new int[r1, c2];
                  for (int i = 0; i <= matrix1.GetUpperBound(1); i++)
                  {
                      for (int j = 0; j <= matrix1.GetUpperBound(0); j++)
                      {
                          for (int k = 0; k <= matrix2.GetUpperBound(1); k++)
                              matrix3[j, k] += matrix1[j, i] * matrix2[i, k];
                      }
                  }
              }
  
              Console.WriteLine("\nResult Matrix\n*************");
              for (int i = 0; i <= matrix3.GetUpperBound(0); i++)
              {
                  for (int j = 0; j <= matrix3.GetUpperBound(1); j++)
                  {
                      Console.Write(matrix3[i, j] + " ");
                  }
                  Console.WriteLine();
              }
              Console.Read();
          }
      }

မရွင္းျပေတာ့ဘူး ကိုယ္တိုင္ပဲ ဖတ္ၾကည့္လိုက္ေနာ္။ နားမလည္တဲ႔ statement ကို ျပန္ေမးေပါ့။

[nyinyi808]

ဆက္ေရးေပးပါဦးအစ္ကို။ ေစာင့္ေမွ်ာ္ေနတယ္ေနာ္...................... ေက်းဇူးလည္းအရမ္းတင္ပါတယ္ဗ်ာ။

[sanlinhtet]

ဆက္ေရးေပးပါ အကိုေရး..ေနာက္ကေတာ႔ လိုက္ေနတာပဲ....
ဟဲဟဲ ... ဘာပဲျဖစ္ျဖစ္ အခုလို အခ်ိန္ကုန္ခံၿပီး ေရးေပး တာေက်းဇူးတင္ပါတယ္...အခု ဟာက နားမလည္ရင္ ရပ္ရပ္ထားေနရတယ္..အကိုေရ..
ဖီလင္ ပ်က္တယ္..အကို႔ဆီက Reply ကုိ ျပန္ေစာင္႔ေနရေသးတယ္...ျဖစ္ႏိုင္ရင္ အျမန္ေမး အျမန္ေျဖစနစ္ေလး ရွိရင္ ေကာင္းမယ္ဗ်...

[khinkaythar]

ေက်းဇူးတင္ပါတယ္အကို
စၿပီးေလ ့လာေနတဲ ့သူေတြနားလည္ေအာင္ေ၇းေပးထားလို ့ေက်းဇူးအထူးတင္ပါတယ္။