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  1. // Elaine Torrez                                          CS1A
  2. // _____________________________________________________________
  3. //
  4. // CALCULATE AVERAGE LETTERS PER WORD
  5. // _____________________________________________________________
  6. // This program prompts the user to enter a sentence. It then
  7. // determines the number of words and the total number of letters
  8. // in the sentence. Finally, it calculates and displays the 
  9. // average number of letters in each word.
  10. // _____________________________________________________________
  11. // INPUT
  12. //   userStr : The sentence entered by the user
  13. //
  14. // OUTPUT
  15. //   words   : Number of words in the sentence
  16. //   letters : Number of letters (A–Z / a–z)
  17. //   average : Average number of letters per word
  18. // _____________________________________________________________
  19.  
  20. #include <iostream>
  21. using namespace std;
  22.  
  23. // FUNCTION PROTOTYPES
  24. int countWords(const char *str);
  25. int countLetters(const char *str);
  26.  
  27. int main()
  28. {
  29.     /****************************************************
  30.      * VARIABLE DECLARATIONS
  31.      ****************************************************/
  32.     const int SIZE = 200;
  33.     char userStr[SIZE];       // INPUT sentence
  34.     int words;                // Number of words
  35.     int letters;              // Number of letters
  36.     float average;            // Average letters per word
  37.  
  38.     /****************************************************
  39.      * INPUT
  40.      ****************************************************/
  41.     cout << "Enter a sentence: ";
  42.     cin.getline(userStr, SIZE);
  43.  
  44.     /****************************************************
  45.      * PROCESS
  46.      ****************************************************/
  47.     words   = countWords(userStr);
  48.     letters = countLetters(userStr);
  49.  
  50.     if (words > 0)
  51.         average = static_cast<float>(letters) / words;
  52.     else
  53.         average = 0;
  54.  
  55.     /****************************************************
  56.      * OUTPUT
  57.      ****************************************************/
  58.     cout << "\nWords   : " << words << endl;
  59.     cout << "Letters : " << letters << endl;
  60.     cout << "Average : " << average << endl;
  61.  
  62.     return 0;
  63. }
  64.  
  65. // *************************************************************
  66. // countWords
  67. // -------------------------------------------------------------
  68. // Returns the number of words in a C-string. A word is counted
  69. // when transitioning from a space to a non-space character.
  70. // *************************************************************
  71. int countWords(const char *str)
  72. {
  73.     int count = 0;
  74.     bool inWord = false;
  75.  
  76.     for (int i = 0; str[i] != '\0'; i++)
  77.     {
  78.         if (str[i] != ' ' && !inWord)
  79.         {
  80.             inWord = true;
  81.             count++;
  82.         }
  83.         else if (str[i] == ' ')
  84.         {
  85.             inWord = false;
  86.         }
  87.     }
  88.  
  89.     return count;
  90. }
  91.  
  92. // *************************************************************
  93. // countLetters
  94. // -------------------------------------------------------------
  95. // Returns the number of alphabetic letters (A–Z, a–z) in
  96. // a C-string. Spaces and punctuation are ignored.
  97. // *************************************************************
  98. int countLetters(const char *str)
  99. {
  100.     int count = 0;
  101.  
  102.     for (int i = 0; str[i] != '\0'; i++)
  103.     {
  104.         if ((str[i] >= 'A' && str[i] <= 'Z') ||
  105.             (str[i] >= 'a' && str[i] <= 'z'))
  106.         {
  107.             count++;
  108.         }
  109.     }
  110.  
  111.     return count;
  112. }
  113.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
Four score and seven years ago
stdout 
Enter a sentence: 
Words   : 6
Letters : 25
Average : 4.16667
https://ideone.com/rXcgIW
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

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