void reverseString(char *str, int x, int y)
{
    while (x < y)
    {
        char tmp = str[x];
        str[x] = str[y];
        str[y] = tmp;

        x++;
        y--;
    }
}

void reverseWords(char *str)
{
    int i = 0;
    int j = 0;

    while (str[j] != '\0')
    {
        if (str[j] == ' ')
        {
            reverseString(str, i, j - 1);
            i = j + 1;
        }
        j++;
    }
    reverseString(str, i, j - 1);
}