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  1. // Elaine Torrez                                          CS1A
  2. // _____________________________________________________________
  3. //
  4. // CAPITALIZE SENTENCES IN STRING
  5. // _____________________________________________________________
  6. // This program prompts the user to enter a string containing 
  7. // one or more sentences. It then updates the string so that 
  8. // the first letter of each sentence is capitalized. The modified
  9. // string is displayed to the user.
  10. // _____________________________________________________________
  11. // INPUT
  12. //   userStr : The original sentence(s) entered by the user
  13. //
  14. // OUTPUT
  15. //   userStr : The modified string with sentences capitalized
  16. // _____________________________________________________________
  17.  
  18. #include <iostream>
  19. using namespace std;
  20.  
  21. // FUNCTION PROTOTYPE
  22. void capitalizeSentences(char *str);
  23.  
  24. int main()
  25. {
  26.     /****************************************************
  27.      * VARIABLE DECLARATIONS
  28.      ****************************************************/
  29.     const int SIZE = 300;
  30.     char userStr[SIZE];       // INPUT and OUTPUT string
  31.  
  32.     /****************************************************
  33.      * INPUT
  34.      ****************************************************/
  35.     cout << "Enter a sentence: ";
  36.     cin.getline(userStr, SIZE);
  37.  
  38.     /****************************************************
  39.      * PROCESS
  40.      ****************************************************/
  41.     capitalizeSentences(userStr);
  42.  
  43.     /****************************************************
  44.      * OUTPUT
  45.      ****************************************************/
  46.     cout << "\nModified sentence:\n";
  47.     cout << userStr << endl;
  48.  
  49.     return 0;
  50. }
  51.  
  52. // *************************************************************
  53. // capitalizeSentences
  54. // -------------------------------------------------------------
  55. // Modifies a C-string so that the first letter of each sentence
  56. // is capitalized. A sentence is considered to end with '.', '?',
  57. // or '!'.
  58. // *************************************************************
  59. void capitalizeSentences(char *str)
  60. {
  61.     bool startOfSentence = true;
  62.  
  63.     for (int i = 0; str[i] != '\0'; i++)
  64.     {
  65.         // Skip leading spaces before a sentence starts
  66.         if (startOfSentence && str[i] == ' ')
  67.             continue;
  68.  
  69.         // Capitalize the first letter of a sentence
  70.         if (startOfSentence && str[i] >= 'a' && str[i] <= 'z')
  71.         {
  72.             str[i] = str[i] - 32; // Convert to uppercase
  73.             startOfSentence = false;
  74.         }
  75.         // If it's already uppercase, just start sentence tracking
  76.         else if (startOfSentence && (str[i] >= 'A' && str[i] <= 'Z'))
  77.         {
  78.             startOfSentence = false;
  79.         }
  80.  
  81.         // Detect sentence-ending punctuation
  82.         if (str[i] == '.' || str[i] == '?' || str[i] == '!')
  83.         {
  84.             startOfSentence = true;
  85.         }
  86.     }
  87. }
  88.  
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
hello. my name is joe. what is your name?
stdout 
Enter a sentence: 
Modified sentence:
Hello. My name is joe. What is your name?
https://ideone.com/m4kMsQ
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

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