Question

please answer only if you know

data structures question

provide C++ code please

4. Write definition of the function LetterCount() whose header is int LetterCount(string word) It returns the count of the distinct letters in word while ignoring case.

Answer 1

#include <iostream>
#include <string>

using namespace std;

int LetterCount(string word) {
    string distinct;

    for (int i = 0; i < word.size(); ++i) { // go through each character of word
        char ch = word[i];  // get character from word
        if (ch >= 'A' && ch <= 'Z') // if character is upeprcase
            ch = ch + 'a' - 'A';    // then convert it to lowercase

        bool found = false; // set found to false
        for (int j = 0; j < distinct.size(); ++j) { // go through all charcters of distinct
            if (ch == distinct[j])  // if this character at word is already in distinct string
                found = true;   // set found to true
        }

        if (!found) {   // if this character is not found in distinct
            distinct += ch; // then add it to distinct string
        }
    }

    return distinct.size(); // finally return the length of distinct string
}

int main() {
    cout << LetterCount("Hellohowareyou") << endl;
    return 0;
}