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  1. #include <iostream>
  2. #include <regex>
  3. #include <string>
  4. #include <stdio.h>
  5. using namespace std;
  6.  
  7. int main()
  8. {
  9. 	regex java("([a-z]+[A-Z]*[a-z]*)+");
  10. 	regex cpp("([a-z]+[_]?[a-z]+)+");
  11. 	regex mayus("[A-Z]");
  12. 	char palabra2[100];
  13. 	while (scanf("%s", palabra2)!=EOF)
  14. 	{
  15. 		string palabra=palabra2;
  16. 		if (regex_match(palabra,java)==false && regex_match(palabra,cpp)==false)
  17. 		{
  18. 			cout << "Error!" << endl;
  19. 		}
  20. 		else if (regex_match(palabra,cpp)) 
  21. 		{
  22. 			for (int i = 0; i < palabra.length(); i++)
  23. 			{
  24. 				if (palabra[i]=='_')
  25. 				{
  26. 					palabra[i+1]=palabra[i+1]-32;
  27. 					palabra.erase(i,1);
  28. 				}
  29. 			}
  30. 			cout << palabra << endl;
  31. 		}
  32. 		else if (regex_match(palabra,java))
  33. 		{
  34. 			for (int i = 0; i < palabra.length(); i++)
  35. 			{
  36. 				if (palabra[i]>='A' && palabra[i]<='Z')
  37. 				{
  38. 					palabra[i]=palabra[i]+32;
  39. 					palabra.insert(i, "_");
  40. 				}
  41. 			}
  42. 			cout << palabra << endl;
  43. 		}
  44. 	}
  45. 	return 0;
  46. }
  47.  
  48.  
Success #stdin #stdout 0s 3560KB
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stdin
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this_is_a_valid_cpp_type_identifier
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Error!
https://ideone.com/fMmhBP
SPOJ: testing JAVAC for german1608
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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