Let say, input character array is “This is a good day”. I need the output as “sihT si a doog yad”.

Logic:

To do this, first we have to fetch the each word from the sentence based on the space and then swap the character in the word.

Code:

  1. string sentense = "This is a good day";
  2. char[] arr = sentense.ToCharArray();
  3. int temp = 0;
  5. //Logic to iterate up to end of the line.
  6. for (int fl = 0; fl <= arr.Length - 1;fl++ )
  7. {
  8. int count = temp;
  9. int num1 = 1;
  10. //To get the word before space or the last word
  11. if (arr[fl] == ' ' || fl == arr.Length - 1)
  12. {
  13. if (fl == arr.Length - 1)
  14. {
  15. for (int c = fl; c >= temp; c--)
  16. {
  17. //Swap the word
  18. if (num1 <= (fl - temp) / 2)
  19. {
  20. char tempC = arr[count];
  21. arr[count] = arr[c];
  22. arr[c] = tempC;
  23. count++;
  24. num1++;
  25. }
  26. }
  27. }
  28. else
  29. {
  30. for (int c = fl - 1; c >= temp; c--)
  31. {
  33. if (num1 <= (fl - temp) / 2)
  34. {
  35. char tempC = arr[count];
  36. arr[count] = arr[c];
  37. arr[c] = tempC;
  38. count++;
  39. num1++;
  40. }
  41. }
  42. }
  43. temp = fl + 1;
  44. }
  46. }
  48. string newLine = new string(arr);
Output:

output

I have attached the class file also for reference.