c++ replacement new 操作

#include <string.h>
#include <malloc.h>
#include <new>//注意必須包括此標頭檔


class CTest
{
public:
CTest(int i,int ii)
{
m = i;
n = ii;
p = new char[100];
strcpy(p,"good test");
}
~CTest()
{
m = 11;
n = 13;
delete[] p;
p = NULL;
}
public:
int m;
int n;

char *p;
};


int main(int argc, char* argv[])
{

char * p = (char*)malloc(sizeof(CTest));
/*-------------------------------------------------------*/
// CTest * pt = new(p) CTest;

//equals with

CTest * pt = (CTest*) p;
pt->CTest::CTest(1,2);//調用建構函式

/*-------------------------------------------------------*/


pt->~CTest();//調用析構

free(p);

return 0;
}