更多"有如下程序: #include < iostream > usin"的相关试题:
[单项选择]有如下程序:
#include <iostream>
using namespace std;
class point
int x, y;
public:
point( int vx, int vy )
x = vx;
y = vy;
point ( )
x = 0;
y = 0;
point operator+( point pl )
point p;
int px = x + p1.x;
int py = y + p1.y;
return point( px, py );
point operator-( point p1 )
point p;
int px = x - p1.x;
int py = y - p1.y;
return point( px, py );
void print( )
cout<<x<<", "<<y<<end1;
;
int main ( )
point pl ( 10, 10 ), p2 ( 20, 20 );
p1 = p1 + p2;
p1.print ( );
return 0;
执行后的输出结果是( )。
A. 10,10
B. 20,20
C. 10,20
D. 30,30