release2.cpp

#include ‹stl.h›

#include ‹iostream.h›

class X {

public:

X(int i_): i (i_) {}

~X() {cout ‹‹ "Delete X(" ‹‹ i ‹‹ ")" ‹‹ endl;}

int i;

};

ostream& operator ‹‹ (ostream& stream_, const X& x_) {

return stream_ ‹‹ "X(" ‹‹ x_.i ‹‹ ")";

}

int main() {

vector‹X*› v;

v.push_back(new X(2));

v.push_back(new X(1));

v.push_back(new X(4));

vector‹X*›::iterator i;

cout ‹‹ "Initial contents:" ‹‹ endl;

for (i = v.begin(); i!= v.end(); i++) cout ‹‹ " " ‹‹ *(*i) ‹‹ endl;

release(v.begin()); // Delete the first heap-based object.

v.erase(v.begin()); // Erase the first element.

cout ‹‹ "Remaining contents:" ‹‹ endl;

for (i = v.begin(); i != v.end(); i++) cout ‹‹ " " ‹‹ *(*i) ‹‹ endl;

release(v.begin(), v.end()); // Delete remaining heap-based objects.

v.erase(v.begin(), v.end()); // Erase remaining elements.

return 0;

}