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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here\
  6. 	int x = 10;
  7. 	int &ref = x;
  8.  
  9. 	++ref;
  10.  
  11. 	cout<<x<<"\t"<<ref<<endl;
  12.  
  13. 	int y = 20;
  14. 	ref = y;
  15.  
  16. 	++ref;
  17.  
  18. 	cout<<y<<"\t"<<ref<<endl;
  19.  
  20. 	int z = 30;
  21. 	int &ref = z;
  22.  
  23. 	++ref;
  24.  
  25. 	cout<<z<<"\t"<<ref<<endl;	
  26.  
  27. 	cout<<x<<"\t"<<y<<"\t"<<z<<endl;
  28. 	return 0;
  29. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function 'int main()':
prog.cpp:7:13: error: 'x' was not declared in this scope
  int &ref = x;
             ^
prog.cpp:21:7: error: redeclaration of 'int& ref'
  int &ref = z;
       ^
prog.cpp:7:7: note: 'int& ref' previously declared here
  int &ref = x;
       ^
stdout
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Standard output is empty
https://ideone.com/gFnCdc
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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