fork(1) download 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct circle {
  5. 	double Area, x,y; 
  6. 	circle& operator++ () {
  7.         Area = Area * 2.0;
  8. 	    cout << "prefix"<<endl; 
  9.         return *this; 
  10. 	}
  11. 	circle operator++ (int) {
  12. 		circle c(*this); 
  13.         Area = Area * 2.0;
  14. 	    cout << "postfix"<<endl; 
  15.         return c; 
  16. 	}
  17. 	void output() { cout <<Area<<" "<<x<<" "<<y<<endl; }
  18. }; 
  19.  
  20.  
  21. /////////////////////////////
  22.  
  23. int main()
  24. {
  25. class circle c1{4, 1, -1}, c2{12, 4, 6};
  26. cout<<"Original: ";
  27. c1.output();
  28. cout<<"Postfix before: ";
  29. (c1++).output();
  30. cout<<"Postfix after: ";
  31. c1.output(); 
  32. cout<<"Prefix: ";
  33. (++c1).output(); 
  34.  
  35. system("pause");
  36. return 0;
  37. }
  38.  
  39.  
Success #stdin #stdout #stderr 0s 3460KB
comments (?)
stdin 
Standard input is empty
stdout 
Original: 4 1 -1
Postfix before: postfix
4 1 -1
Postfix after: 8 1 -1
Prefix: prefix
16 1 -1
stderr 
sh: 1: pause: not found
https://ideone.com/9Caq48
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!