BEGINNER's REMOVE QUESTION MARKS AND PRINT STRING

Given a string with elements having lowercase letters and question marks. Replace each question mark with lowercase letter such that the element is not equal to the element before it and the element after it. Ex:- Input String:- abcab??bac? Output:- abcabacbaca (There can be a lot of different outputs, anyone of them was accepted) Input String:- ???????? Output:- abcdefgh

SOLUTION:

1. using System;
2. using System.Linq;
4. public class RemoveQMark
5. {
6. public string getcleantext(string text)
7. {
8. char[] textarray = text.ToCharArray();
9. int n = text.Length;
10. char[] cleantextarray = new char[n];
11. int j=0;
12. for(int i=0;i<n;i++)
13. {
14. if(textarray[i] != '?')
15. {
16. cleantextarray[j]= textarray[i];
17. j++;
18. }
19. }
20. string cleantext =new String(cleantextarray.Where(c => !char.IsWhiteSpace(c)).Distinct().ToArray());
21. string clean =cleantext.Trim();
22. return clean;
23. }
24. }
26. public class GetNewString
27. {
28. public void getNewText(string cleantext,string text)
29. {
30. char[] cleantextarray = cleantext.ToCharArray();
31. char[] originaltext = text.ToCharArray();
32. int n = text.Length;
33. int m=cleantext.Length;
34. char[] endtextarray = new char[text.Length];
35. for(int i=0;i<n;i++)
36. {
37. if(originaltext[i] == '?')
38. {
39. for(int j=0;j<m-1;j++)
40. {
41. if (i!=0 && i!=(n-1) && (cleantextarray[j]!=originaltext[i-1]) && (cleantextarray[j]!=originaltext[i+1]))
42. {
43. if(endtextarray[i-1]!=cleantextarray[j] && endtextarray[i+1]!=cleantextarray[j])
44. {
45. endtextarray[i] = cleantextarray[j];
46. }
47. else
48. {
49. break;
50. }
51. }
52. else if(i==0 && (cleantextarray[j]!=originaltext[i+1]))
53. {
54. if(endtextarray[i+1]!=cleantextarray[j])
55. {
56. endtextarray[i] = cleantextarray[j];
57. }
58. else
59. {
60. break;
61. }
62. }
63. else if(i==(n-1) && (cleantextarray[j]!=originaltext[i-1]))
64. {
65. if(endtextarray[i-1]!=cleantextarray[j])
66. {
67. endtextarray[i] = cleantextarray[j];
68. }
69. else
70. {
71. break;
72. }
73. }
74. }
75. }
76. else
77. {
78. if(i!=0 && i<n)
79. {
80. if(endtextarray[i-1]!=originaltext[i])
81. {
82. endtextarray[i]=originaltext[i];
83. }
84. }
85. else if(i==0)
86. {
87. if(endtextarray[i+1]!=originaltext[i])
88. {
89. endtextarray[i]=originaltext[i];
90. }
91. }
92. else if(i==n-1)
93. {
94. if(endtextarray[i-1]!=originaltext[i])
95. {
96. endtextarray[i]=originaltext[i];
97. }
98. }
99. }
100. }
101. string endtext = new String(endtextarray.ToArray());
102. Console.WriteLine(endtext);
103. }
104. }
105. public class Test
106. {
107. public static void Main()
108. {
109. Console.WriteLine("Please Enter text:");
110. var text = Console.ReadLine();
111. RemoveQMark rqm = new RemoveQMark();
112. string cleantext = rqm.getcleantext(text);
113. GetNewString gns = new GetNewString();
114. gns.getNewText(cleantext,text);
115. }
116. }

INPUT:
abcab??bac?
OUTPUT:

Please Enter text:
abcabcabacb