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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4.  
  5. int main()
  6. {
  7. 	while(true)
  8. 	{
  9. 		std::cout << std::endl;
  10.  
  11. 		std::string input;
  12. 		if(!std::getline(std::cin, input))
  13. 		{
  14. 			std::cout << "End of input" << std::endl;
  15. 			break;
  16. 		}
  17.  
  18. 		bool understood = false;
  19.  
  20. 		//Try to read it as a number
  21. 		{
  22. 			int n;
  23. 			if(std::istringstream(input) >> n)
  24. 			{
  25. 				std::cout << "You entered a number: " << n << std::endl;
  26. 				understood = true;
  27. 			}
  28. 		}
  29.  
  30. 		//Try to interpret it as a character
  31. 		if(input.length() == 1)
  32. 		{
  33. 			std::cout << "You entered a character: " << static_cast<int>(input[0]) << std::endl;
  34. 			understood = true;
  35. 		}
  36.  
  37. 		//Otherwise, just give back what we got
  38. 		if(!understood)
  39. 		{
  40. 			std::cout << "You entered something else: \"" << input << "\"" << std::endl;
  41. 		}
  42. 	}
  43. }
  44.  
Success #stdin #stdout 0s 3480KB
comments (?)
stdin 
123
7
h
hello
stdout 
You entered a number: 123

You entered a number: 7
You entered a character: 55

You entered a character: 104

You entered something else: "hello"

You entered something else: ""

End of input
https://ideone.com/Jk5Pos
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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