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pointermap.cpp
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pointermap.cpp
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#include<iostream>
#include<algorithm>
#include<set>
#include<iterator>
using namespace std;
class StringPtrLess//:public binary_function<const string*, const string*, bool>
{
public:
template<class T>
bool operator()(const T* ptr1, const T* ptr2) const
{
return *ptr1 < *ptr2;
}
};
class Print
{
public:
void operator()(const string* str)
{
cout << *str << endl;
}
};
class Deference
{
public:
template<class T>
const T& operator()(T* ptr)const
{
return *ptr;
}
};
int main(void)
{
set<string*, StringPtrLess> setStr;
setStr.insert(new string("ing"));
setStr.insert(new string("abc"));
setStr.insert(new string("def"));
for_each(setStr.begin(), setStr.end(), Print());
transform(setStr.begin(), setStr.end(), ostream_iterator<string>(cout ,"\n"), Deference());
return 0;
for (set<string*>::iterator it=setStr.begin(); it!=setStr.end(); it++)
{
cout << **it<< endl;
}
return true;
}