下面代码段执行后的输出结果是()
#include <iostream> class cla { static int n; public: cla() { n++; } ~cla() { n--; } static int get_n() { return n; } }; int cla::n=0; int main() { cla *p = new cla; delete p; std::cout << "n=" << cla::get_n() << std::endl; return 0; }