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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. struct Complex { double realPart, imaginaryPart; }; 
  6.  
  7. istream &operator>>(istream &input, Complex &complex)
  8. {
  9. 	char plus,letter;
  10.     if (input >> complex.realPart >> plus)  {
  11.     	if (plus!='+' ) 
  12.             input.setstate(ios::failbit);
  13.         else if (input >> complex.imaginaryPart>>letter) {
  14.              if (letter!='i')
  15.         	     input.setstate(ios::failbit);
  16.         }
  17.     }
  18.     return input;
  19. }
  20.  
  21. int main() {
  22. 	Complex c; 
  23. 	if (cin>>c) 
  24. 	   cout << "Succeeded: "; 
  25. 	else cout << "Failed: ";
  26. 	cout <<c.realPart<<"+"<<c.imaginaryPart<<"i"<<endl;
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 3276KB
comments ()
stdin
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12 + 13i
stdout
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Succeeded: 12+13i
https://ideone.com/4ayqBK
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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