vectorcoredump.cpp

来自「很经典的书籍」· C++ 代码 · 共 22 行

//: C07:VectorCoreDump.cpp
// Invalidating an iterator
#include <iterator>
#include <iostream>
#include <vector>
using namespace std;

int main() {
  vector<int> vi(10, 0);
  ostream_iterator<int> out(cout, " ");
  vector<int>::iterator i = vi.begin();
  *i = 47;
  copy(vi.begin(), vi.end(), out);
  cout << endl;
  // Force it to move memory (could also just add
  // enough objects):
  vi.resize(vi.capacity() + 1);
  // Now i points to wrong memory:
  *i = 48;  // Access violation
  copy(vi.begin(), vi.end(), out); // No change to vi[0]
} ///:~