Question

Используя обменную сортировку, отсортировать массив по убыванию Сделать в динамическом массиве чтобы все элементы вводились с клавиатуры PascalABC

Answer 1

// PascalABC.Net 3.2
begin
  var n:=ReadInteger('Введите количество элементов массива:');
  Writeln('Введите элементы массива');
  var a:=ReadArrInteger(n);
  for var i:=0 to n-2 do
    for var j:=i+1 to n-1 do
      if a[i]<a[j] then Swap(a[i],a[j]);
  a.Println
end.

Тестовый пример
Введите количество элементов массива: 10
Введите элементы массива
57 18 31 40 45 75 85 43 93 27
93 85 75 57 45 43 40 31 27 18

Answer 2

Sorting a Dynamic Array in PascalABC using Exchange Sort

To sort a dynamic array in PascalABC using exchange sort and to allow input of all elements from the keyboard, you can follow the steps below:

1. Declare the Dynamic Array: - Declare a dynamic array to store the elements input by the user from the keyboard.

   var
     arr: array of Integer;
     n, i, j, temp: Integer;
   

2. Input the Number of Elements: - Prompt the user to input the number of elements in the array.

   Write('Enter the number of elements: ');
   Readln(n);
   SetLength(arr, n);
   

3. Input Array Elements: - Use a loop to input the elements of the array from the keyboard.

   for i := 0 to n - 1 do
   begin
     Write('Enter element ', i + 1, ': ');
     Readln(arr[i]);
   end;
   

4. Implement the Exchange Sort Algorithm: - Use the exchange sort algorithm to sort the array in descending order.

   for i := 0 to n - 2 do
   begin
     for j := i + 1 to n - 1 do
     begin
       if arr[i] < arr[j] then
       begin
         temp := arr[i];
         arr[i] := arr[j];
         arr[j] := temp;
       end;
     end;
   end;
   

5. Display the Sorted Array: - Display the sorted array after sorting it in descending order.

   Writeln('The sorted array in descending order is: ');
   for i := 0 to n - 1 do
     Write(arr[i], ' ');
   

By following these steps, you can implement the exchange sort algorithm to sort a dynamic array in PascalABC in descending order while allowing the user to input all the elements from the keyboard.

Note: The provided code is based on the PascalABC.NET language, which supports a syntax similar to Pascal and Delphi.

Feel free to ask if you need further assistance or clarification!