C++ Read from the keyboard util the word "gata" and show the longest word that contains only vocals

#include <iostream>
#include <string.h>

using namespace std;

int main() {
    char cuvant[100], copie[100];
    bool esteVocala;
    bool verificare;
    char vocale[] = "aeiou";
    char max[100] = "\0";
    int i, j;

    verificare = false;
    esteVocala = false;
    while (strcmp("gata" ,cuvant)) {
        cin >> cuvant;

        for (i = 0; i < strlen(cuvant);i++) {
            esteVocala = false;
            for (j = 0; j < strlen(vocale);j++) {
                if (cuvant[i] == vocale[j]) {
                    esteVocala = true;
                }
            }
            if (!esteVocala) {
                verificare = false;
                break;
            } else {
                verificare = true;
            }
        }
        if (verificare) {
            if (strlen(cuvant) > strlen(max)) {
                strcpy_s(max, cuvant);
            }
        }

    }

    cout << "Cel mai lung cuvant si doar cu vocale: " << max << endl;

    system("pause");
}