翻转字符串

输入i love you so much,  输出  much so you love i.

#include<iostream>
using namespace std;

void  Reverse(char *begin, char *end)
{
	if(begin == NULL || end == NULL)
		return;
	while(begin < end)
	{
		char temp = *begin;
		*begin = *end;
		*end = temp;

		begin++;
		end--;
	}
}


char* ReverseSentence(char *arr)
{
	if(arr == NULL)
	{
		return  NULL;
	}

	char *begin = arr;
	char *end = arr;

	while(*end != '\0')
	{
		end++;
	}
	--end;

	Reverse(begin, end);

	begin = end = arr;
	while(*begin != '\0')
	{
		if(*begin == ' ')
		{
			begin++;
			end++;
		}
		else if(*end == ' '|| *end == '\0')
		{
			Reverse(begin, --end);
			begin =  ++end;
		}
		else
		{
			end++;
		}
	}
	return arr;
}

int main()
{
	char arr[] = "i love you so much";
	ReverseSentence(arr);
	printf("%s\n", arr);
	return 0;
}