vectorcoredump.cpp

Think in C++ 第二版源码

//: C20:VectorCoreDump.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// How to break a program using a vector
#include <vector>
#include <iostream>
using namespace std;

int main() {
  vector<int> vi(10, 0);
  ostream_iterator<int> out(cout, " ");
  copy(vi.begin(), vi.end(), out);
  vector<int>::iterator i = vi.begin();
  cout << "\n i: " << long(i) << endl;
  *i = 47;
  copy(vi.begin(), vi.end(), out);
  // Force it to move memory (could also just add
  // enough objects):
  vi.resize(vi.capacity() + 1);
  // Now i points to wrong memory:
  cout << "\n i: " << long(i) << endl;
  cout << "vi.begin(): " << long(vi.begin());
  *i = 48;  // Access violation
} ///:~