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 p1 ) { 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 p1( 10, 10 ), p2( 20, 20 ); p1 = p1 + p2; p1.print(); return ();}执行后的输出结果是( )。
A.10, 10
B.20, 20
C.10, 20
D.30, 30
第1题:
有以下程序: #include<iostream> using namespace std; #definePl 3.14 Class Point {private: int x,y; public: Point(int a,intB) {X=a; y:b;} int getx() <return x;} int gety() {return y;}}; class Circle:public Point {pri
A.314
B.157
C.78.5
D.153.86
第2题:
有以下程序: #include<iostream> #include<math> using namespace std; class point { private: double x; double y; public: point(double a,double B) { x=a; y=b; } friend double distance (point a,point B) ;
A.1
B.5
C.4
D.6
第3题:
若有以下程序: #include <iostream> using namespace std; class point { private: int x, y; public: point ( ) { x=0; y=0; } void setpoint(int x1,int y1) { x=x1; y=y1;
A.12,12
B.5,5
C.12,5
D.5,12
第4题:
有如下程序: #inClude<iostream> using namespaCe std; Class Point{ publiC: statiC int number; publiC: Point( )t.number++;} ~Point( ){number--;} }; , int P0int::number=0; int main( ){ Point *ptr: Point A,B; Point*ptr_point=new Point[3]; ptr=ptr_point;’ } Point C; Cout<<Point:::number<<endl; delete[]ptr; return 0; } 执行这个程序的输出结果是( )。
A.3
B.4
C.6
D.7
第5题:
有以下程序: #include <iostream> using namespace std; #define PI 3.14 class Point { private: int x,y; public: Point(int a,int b) { x=a; y=b; } int getx() { return x; }
A.314
B.157
C.78.5
D.153.86
第6题: