C++ :: Reverse Alternate Words In A String

How do reverse every alternate words in a string that I read into my program:

e.g. The mouse was caught in a clothes peg.
reversed (including the full stop)
The esoum was thguac in a clothes gep.

I could program it to reverse the whole sentence. But no clue how to reverse certain words such as every even word. Do I need a function and/or loop to solve this?

#include<iostream> // allow input and output
#include<string> // allow for larger entries of characters
using namespace std;
int main() {
string sentence, reversed_sentence;

[Code] ....