1 #include <bits/stdc++.h> 2 using namespace std; 3 class xiexin 4 { 5 public: 6 xiexin() 7 { 8 weight=0; 9 grade=0; 10 cout<<"weight="<<weight<<",grade="<<grade<<endl; 11 } 12 xiexin(int w,int g) 13 { 14 weight=w; 15 grade=g; 16 cout<<"weight="<<weight<<",grade="<<grade<<endl; 17 } 18 ~xiexin() 19 { 20 cout<<"Destructor...... "; 21 } 22 void setvalue(int w=100,int g=40) 23 { 24 weight=w; 25 grade=g; 26 cout<<"weight="<<weight<<",grade="<<grade<<endl; 27 } 28 static int calculate(xiexin obj) 29 { 30 return obj.weight*obj.grade; 31 } 32 friend void display(xiexin obj); 33 private: 34 int weight; 35 int grade; 36 static int cnt; 37 }; 38 int xiexin::cnt=0; 39 void display(xiexin obj) 40 { 41 cout<<"weight="<<obj.weight<<",grade="<<obj.grade<<",total="<<xiexin::calculate(obj)<<endl; 42 } 43 int main() 44 { 45 xiexin boxl; 46 display(boxl); 47 xiexin box2(5,10); 48 display(box2); 49 box2.setvalue(20,18); 50 display(box2); 51 }
如果函数中有多条语句的话，会先执行完这些语句，直到函数结束再析构
