记录成长的点点滴滴. . . . .

#ifndef __RECT_H__#define __RECT_H__class Rectangle{private: double x1,y1,x2,y2; double lenth,wide;public: Rectangle(double xx1=0,double yy1=0,double xx2=0,double yy2=0); Rectangle(const Rec

#includeusing namespace std;class test{private: int a,b;public: test(int aa=0,int bb=0,int cc=3):c(cc)//常数据成员只能用初始化列表 //而且其值不能被更新 { a=a

#include using namespace std;class test{private: int a,b;public: test(int aa,int bb){a=aa;b=bb;} void fun(test &t) { t.a=-t.a; cout<<t.a<<' '<<t.b<<endl; }

#include using namespace std;class test1{public: test1() { cout<<"test1 构造"<<endl; } ~test1() { cout<<"test1 析构"<<endl; }};class test2:public test1{