C语言中经典问题--高手帮忙

#include "iostream"
#include <string.h>
using namespace std;

struct A
{
unsigned short a;
unsigned short b;
}Test1;

struct B
{
unsigned short c;
unsigned short d;
}Test2;

void main()
{
Test1.a = 12345;
Test1.b = 4321;

B *p;
char buff[1024];
int len;

p = (B*)buff;
len = sizeof(B);

memcpy(buff+len,&Test1,sizeof(Test1));
len += sizeof(Test1);

p->c = 678;
p->d = len;

cout<<buff<<endl;
}

这段代码我想把这些数字封装到buff中，可是打印出来是乱码，不知道问题出在哪了，高手帮忙。

#include "iostream"
#include <string.h>
using namespace std;

struct A
{
unsigned short a;
unsigned short b;
}Test1;

struct B
{
unsigned short c;
unsigned short d;
}Test2;

main()
{
Test1.a = 12345;
Test1.b = 4321;

B *p;
char buff[1024];
int len;

p = (B*)buff;
len = sizeof(B);

memcpy(buff,&Test1,sizeof(Test1));
len += sizeof(Test1);

p->c = 678;
p->d = len;

cout<< ((B*)buff)->c << ' ' << ((B*)buff)->d <<endl;
}