#include<stdio.h>
#include <stdarg.h>

void reverse(char *, char *);
void reverseWords1(unsigned, char*, ...);
void reverseWords2(char *, ...);
void reverseWords3(char*, ...);



int main()
{
	printf("\nExample of the first working function\n");
	char s[][30] = { "i like this program very much", "im the boss", "get that paper", "raise the pot" };
	reverseWords1(4, s[0], s[1], s[2], s[3]);
	printf("\nExample of the second working function\n");
	char p[][50] = { "i like this program very much", "im the boss", "get that paper", "raise the pot", "one more sentence", "0 this one wont work cuz it has zero in it" };
	reverseWords2(p[0], p[1], p[2], p[3], p[4], p[5]);
	char k[] = { "1234" };
	printf("\nExample of the third working function\n");
	reverseWords3(k, p[0], p[1], p[2], p[3]);
	getchar();
	return 0;
}

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

void reverseWords1(unsigned k, char *s, ...)
{
	for (unsigned i = 0; i < k; ++i)
	{
		char *word_begin = s;
		char *temp = s;


		while (*temp)
		{
			temp++;
			if (*temp == '\0')// reverse the last word, cycle ends, temp is null
			{
				reverse(word_begin, temp - 1);
			}
			else if (*temp == ' ')// reverse the word before space and put word_begin on char after space
			{
				reverse(word_begin, temp - 1);
				word_begin = temp + 1;
			}
		}
		reverse(s, temp - 1);// temp-1 - the last char
		printf("\n%s\n", s);
		while (*temp == '\0')
			temp++;
		s = temp;
	}

}

void reverseWords2(char *s, ...)
{
	while (*s != '0')
	{
		char *word_begin = s;
		char *temp = s;


		while (*temp)
		{
			temp++;
			if (*temp == '\0')// reverse the last word, cycle ends, temp is null
			{
				reverse(word_begin, temp - 1);
			}
			else if (*temp == ' ')// reverse the word before space and put word_begin on char after space
			{
				reverse(word_begin, temp - 1);
				word_begin = temp + 1;
			}
		}
		reverse(s, temp - 1);// temp-1 - the last char
		printf("\n%s\n", s);
		while (*temp == '\0')
			temp++;
		s = temp;
	}
}

void reverseWords3(char *s, ...)
{
	va_list parg;
	va_start(parg, s);
	char *pt = s;
	while (*pt != '\0')
	{
		char *word_begin = va_arg(parg, char*);
		char *temp = word_begin;
		char * d = word_begin;

		while (*temp)
		{
			temp++;
			if (*temp == '\0')// reverse the last word, cycle ends, temp is null
			{
				reverse(word_begin, temp - 1);
			}
			else if (*temp == ' ')// reverse the word before space and put word_begin on char after space
			{
				reverse(word_begin, temp - 1);
				word_begin = temp + 1;
			}
		}
		reverse(d, temp - 1);// temp-1 - the last char
		printf("\n%s\n", d);
		pt++;
	}
	va_end(parg);
}