单词翻转

1.方法一：

I am from shanghai ----->shanghai from am I

1.  I ma morf iahgnahs

2.  shanghai from am I

#include "iostream"
using namespace std;

void RevStr(char * src)
{
	char * start=src,*end=src,*ptr=src;
	while (*ptr++!='\0') //
	{

         if (*ptr==' '||*ptr=='\0')

{end=ptr-1;while (start<end){swap(*start++,*end--);}start=ptr+1;

          }
	}

	start=src,end=ptr-2;
	while(start<end)
	swap(*start++,*end--);

}

int main()
{
	char src[]={"I am from Shanghai"};
	cout<<src<<endl;
	RevStr(src);
	cout<<src<<endl;
	return 0;

}

2.方法二：

1.  iahgnahs morf ma I

2.  shanghai from am I

#include "iostream"
using namespace std;

void RevStr(char * src)
{
	char * start=src,*end=src,*ptr=src;

	while (*ptr++!='\0') //
		end=ptr-1;
	while (start<end)
	{
		swap(*start++,*end--);
	}
	
	
	start=src,end=ptr-2,ptr=src;
	while(*ptr++!='\0')
	{
		if (*ptr==' '||*ptr=='\0')
		{
			end=ptr-1;
			while(start<end)
        	swap(*start++,*end--);

			start=end=ptr+1;

		}

	}


}

int main()
{
	char src[]={"I am from Shanghai asdfg"};
	cout<<src<<endl;
	RevStr(src);
	cout<<src<<endl;
	return 0;

}