Program in C to reverse words in a string

Write a program in C to reverse words in a string 

#include <stdio.h>

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;

}