标准异常

#include <iostream>#include <new>   // new头文件表示标准异常bad_allocusing namespace std;class Dog{public:Dog(){parr = new int[1000000];  // 4MB}private:int *parr;};int main(){Dog *pDog;try{for(int i = 0; i < 1000; i++){pDog = new Dog();cout << i << ": new Dog 成功，" << endl;}}catch(bad_alloc err){cout << "new Dog 失败：" << err.what() << endl;}return 0;}