#include <iostream> #include <cstdlib> using namespace std;

class myclass { int *p; public: myclass(int i); ~myclass(); int getval(){return *p;} };

myclass::myclass(int i) { cout<<"Allocating p\n"; p = new int; *p = i; }

myclass::~myclass() { cout<<"Freeing p\n"; delete p; }

void display(myclass ob) { cout<<ob.getval()<<'\n'; }

int main() { myclass a(10); display(a);

return 0; }

给出程序的运行结果

都说过了，代码里面的错误是故意弄上去的

"><cstdlib>

namespace std {#include <stdlib.h> };

Include the standard header <cstdlib> to effectively include the standard header <stdlib.h> within the std namespace.

——MSDN Library里面的解释