C++ Buizel Hangman, But There's No Hanging

#include <iostream>

int searchArray(char character[], int size, char letterChoice);
void showWord(char letter[], bool guessed[], int size);

int main() {
    //Create a basic hangman.
    char letters[] = {'B','u','i','z','e','l'};
    bool letterGuessed[] = {false, false, false, false, false, false};
    int arraySize = sizeof(letters) / sizeof(char);
    int index;
    char letterChoice;
    bool gameWon = false;

    std::cout << "******************************\n";
    std::cout << "Welcome to a one-word Hangman!\n";
    std::cout << "******************************\n";
    std::cout << "Yeah, this one's just to test the search and execute it in a function. Nothing huge or ground-breaking. No penalties either!\n";

    do{
        std::cout << "Guess a letter: ";
        std::cin >> letterChoice;
        if(letterChoice == 'b') {
            letterChoice = 'B';
        }

        index = searchArray(letters,arraySize,letterChoice);

        //Create something that presents letters as visible.
        if(index != -1) {
            letterGuessed[index] = true;
        }

        showWord(letters,letterGuessed,arraySize);
        std::cout << '\n';

        if(letterGuessed[0] == true && letterGuessed[1] == true && letterGuessed[2] == true && letterGuessed[3] == true && letterGuessed[4] == true && letterGuessed[5] == true) {
            std::cout << "You win! The word was Buizel!\n";
            break;
        }

    }while(gameWon == false);
}

int searchArray(char character[], int size, char choice) {
    for(int i = 0; i < size; i++) {
        if(character[i] == choice) {
            return i;
        }
    }
    return -1;
}

void showWord(char letter[], bool guessed[], int size){
    for(int i=0; i<size; i++) {
        if(guessed[i] == true) {
            std::cout << letter[i];
        }
        else {
            std::cout << "_";
        }
    }
}