int pw(void){
    int i, n_passwords;
    int j = 1, k;
    char c;
    printf("Indique o número de passwords que deseja : ");
    scanf("%d", &n_passwords);
    char pass[n_passwords][14];

    srand(time(NULL));
    while (j <= n_passwords){
        k = 0;
        for (i = 0; i < 3; ++i){
            c = 'a' + rand() % ('z' - 'a' + 1);
            printf("%c", c);
            pass[j-1][k++] = c;
        }
        for (i = 0; i < 3; ++i){
            c = 'A' + rand() % ('Z' - 'A' + 1);
            printf("%c", c);
            pass[j-1][k++] = c;
        }
        for (i = 0; i < 3; ++i){
            c = '1' + rand() % ('1' - '9' + 1);
            printf("%c", c);
            pass[j-1][k++] = c;
        }
        for (i = 0; i < 4; ++i){
            c = '!' + rand() % ('!' - '/' + 1);
            printf("%c", c);
            pass[j-1][k++] = c;
        }
        j++;
        printf("\n\n");
    }
    system("pause");
}