单项选择题

若有以下程序：
#include ＜iostream＞
using namespace std;
class Aprivate:
int a;
public:
void seta(int x)

a=x;

void showa()

cout＜＜a＜＜",";

;
class Bprivate:
int b;
public:
void setb(int x)

b=x;

void showb()

cout＜＜b＜＜",";

;
class C: public A, private Bprivate:
int c;
public:
void setc(int x, int y, int z)

c=z;
seta(x);
setb(y);

void showc()

showa();
showb();
cout＜＜c＜＜end1;

;
int main() C c;
c.setc(1,2,3);
c.showc();
return 0;程序执行后的输出结果是( )。