How to reverse the letters of all the words only, not of the full string?

[abdalimran]

I want to reverse the letters of all the words only, not the full string.
For example:
Input: You are Mike.
Output: uoY era .ekiM

How to do this using the functions of string class?

I started with a approach in which I tried to find the space using str.find(' ') and reverse the letters before the space position. But I could do this for the first word only.

How to do it?

[keskiverto]

Do you need to preserve the whitespace verbatim?

If not, then read and print one word at a time.

[anup30]

using stringstream,

#include <iostream>
#include <sstream>
using namespace std;

string rev (string s)
{
	char temp;
	unsigned long long int i=0, lli = s.length()-1;
	while(i<lli)
		{ 
			temp = s[i]; 
			s[i] = s[lli]; 
			s[lli] =temp; 
			i++;
			lli--;
		}	
return s;
}

int main()
{
	string st = "you are  Mike.";
	stringstream ss;
	string s1;
	ss << st;
	while(ss>>s1)
	{
		s1 = rev(s1);
		cout << s1 << " ";
	}

return 0;
}

EDIT: notice that multiple spaces are converted into single space.