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Need help with this small program that uses a string.

Posted on 2006-11-11
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Last Modified: 2010-04-01
Hi Experts,

I'm writing this program, my instructions are:

Write function that accepts a string as an input then prints out the following:
a. Number of characters in the string excluding spaces
b. Number of letter "a" (small or capital) in the string
c. Number of alphabets in the string

I would like to know if as right now my program is coded as directed, and if you could please
let me know how I would go about doing a and c.

I have spent a big portion of the day trying to lookup examples or info on the net or on this site on how that is done
with no success.

Thank you for your time and help.
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Question by:manz2
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4 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 17922381
Well, since this is homework, it would be a good idea to post what you already have. And as 'b.' does not seem to be a problem, why don't you use the same techique for 'a.' and 'c.', because the task is almost identical. As a hint, use a loop to iterate through the string like

unsigned int len = strlen(str);

for (unsigned int i = 0; i < len; ++i) {

    char c = str[i];
}
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Author Comment

by:manz2
ID: 17922391
Sorry, I forgot to post my program.

#include <iostream>
#include <string>
#include <cctype>
using namespace std;

void showValues(string, int);

int main()
{
      string sentence;

      cout << "Enter any sentence you wish and I will tell you the following:\n" <<  endl;
      cout << "1. Number of letter A's (small or capital) in the string.\n";
      cout << "2. Number of characters in the string excluding spaces.\n";
      cout << "3. Number of alphabets in the string.\n" << endl;
      cout << "Enter sentence now:\n";
      getline(cin, sentence);

      showValues(sentence, sentence.length());
      system("pause");
      return 0;
}

void showValues (string chars, int size)
{
      cout << "\nThe string is:"<< endl;
      for (int index = 0; index < size; index++)
            cout << chars[index];
      cout << endl;

      // Show how many A's

      char ch;
      int vowelCount = 0;

      for (int pos = 0; pos < size; pos++)
      {
            ch=toupper(chars[pos]);

            switch(ch)
            {
            case 'A': vowelCount++;
            }
      }
      cout << "\nThere are " << vowelCount << " A's (small or capital) in the string.\n";
}



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LVL 86

Accepted Solution

by:
jkr earned 2000 total points
ID: 17922435
Well, that's a good start. For 'a.' and 'c.' you just have to introduce the suitable tests, i.e.

if (ch != ' ') number_of_chars_excluding_spaces++;

or

if (0 != isalpha(ch)) number_of_alphabets++;
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