Reverse words in a String C Program

#include
void reverse(char *begin, char *end);
void reverseWords(char *s)
{
char *word_begin = s;
char *temp = s;
while( *temp )
{
temp++;
if (*temp == '\0')
{
reverse(word_begin, temp-1);
}
else if(*temp == ' ')
{
reverse(word_begin, temp-1);
word_begin = temp+1;
}
}

reverse(s, temp-1);
}

void reverse(char *begin, char *end)
{
char temp;
while (begin < end)
{
temp = *begin;
*begin++ = *end;
*end-- = temp;
}
}

int main( )
{
char s[] = "i like this program very much";
char *temp = s;
reverseWords(s);
printf("%s", s);
getchar();
return 0;
}