异常处理

#include <iostream>
using namespace std;
class Rainbow {
public:
  Rainbow() { cout << "Rainbow()" << endl; }
  ~Rainbow() { cout << "~Rainbow()" << endl; }
};
void oz() {
  Rainbow rb;
  for(int i = 0; i < 3; i++)
    cout << "there's no place like home" << endl;
  throw 47;
}
int main() {
  try {
    cout << "tornado, witch, munchkins..." << endl;
    oz();
  } catch(int) {
    cout << "Auntie Em! I had the strangest dream..."
         << endl;
  }
  getchar();
} ///:~


#include <iostream>
#include <csetjmp>
using namespace std;
class Rainbow {
public:
  Rainbow() { cout << "Rainbow()" << endl; }
  ~Rainbow() { cout << "~Rainbow()" << endl; }
};
jmp_buf kansas;
void oz() {
  Rainbow rb;
  for(int i = 0; i < 3; i++)
    cout << "there's no place like home" << endl;
  longjmp(kansas, 47);
}
int main() {
  if(setjmp(kansas) == 0) {
    cout << "tornado, witch, munchkins..." << endl;
    oz();
  } else {
    cout << "Auntie Em! "
         << "I had the strangest dream..."
         << endl;
  }
} ///:~