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#include <iostream>
#include <iterator>
#include <vector>
/*
*
* 4.20
*
*
*/
int main () {
std::string s1 = "Wow!";
std::string s2 = "C++ is very cool, i like it!";
std::string s3 = "I also really like C!";
std::vector<std::string> vs;
vs.push_back(s1);
vs.push_back(s2);
vs.push_back(s3);
std::vector<std::string>::iterator iter = vs.begin();
std::cout << *iter++ << std::endl;
std::cout << iter->empty() << std::endl;
std::cout << iter++->empty() << std::endl;
/*
(a) *iter++; // valid
(b) (*iter)++; // not valid? we dereference and try to increment a string which does not work
(c) *iter.empty() // not valid, we try to call .empty() member function on an iterator, which does not exist
(d) iter->empty(); // valid
(e) ++*iter; // not valid, we are dereferencing and then trying to increment a string. I am a bit confused because i thought precedence of the ++ operator would make it increment first and then dereference it but it does not seem so...
(f) iter++->empty(); // valid
*/
return 0;
}
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