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  1. #include <iostream>
  2. #include <string>
  3. typedef unsigned int uint;
  4.  
  5. std::string simpletransform(
  6. 	const std::string &line,
  7. 	const std::string &key,
  8. 	const uint number);
  9. int main()
  10. {
  11.     std::string line="thisisamessage";
  12. 	uint number = 5;
  13.     std::string key = "32154";
  14. 	std::cout<<simpletransform(line,key,number)<<std::endl;
  15.     return 0;
  16. }
  17. std::string simpletransform(
  18. 	const std::string &line,
  19. 	const std::string &key,
  20. 	const uint number)
  21. 	{
  22. 	std::string resultstr;
  23. 	std::string substr;
  24. 	size_t N = line.size()%number;
  25. 	size_t i=0;
  26. 	for(size_t j=0;i<N-number;i++,j++)
  27. 		{
  28. 		if(i%number==0)
  29. 			{
  30. 			substr = line.substr(i,number);
  31. 			j=0;
  32. 			if(substr.size()!=number) break;
  33. 			}
  34. 		auto temp = static_cast<uint>(key[j])-49;
  35. 		resultstr += substr[temp];
  36. 		}
  37. 	i=0;
  38. 	for(size_t count =0;count!=number;count++)
  39. 		{
  40. 		auto p = static_cast<uint>(key[count])-49;
  41. 		if(p>=N)
  42. 			continue;
  43. 		resultstr += substr[p];
  44. 		}
  45. 	return resultstr;
  46. 	}
  47.  
Success #stdin #stdout 0s 3232KB
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ihtismassegase
https://ideone.com/Q8am2s
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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