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  1. #include <iostream>
  2. #include <cmath>
  3. #include <list>
  4.  
  5. std::size_t CountDidit(int N){
  6. 	std::size_t i=0;
  7.  
  8. 	while (N != 0){
  9. 		i++;
  10. 		N /= 10;
  11. 	}
  12.  
  13. 	return i;
  14. }
  15.  
  16. int SnipeDigit(int N, int P){
  17. 	int A = std::pow(10, P);
  18. 	int B = N / A;
  19. 	int C = (N / (A * 10)) * 10;
  20.  
  21. 	return B - C;
  22. }
  23.  
  24. int Sign(int N){
  25. 	return N >= 0 ? 1:-1;
  26. }
  27.  
  28. int MakeHoge(int N){
  29. 	std::list<int> L;
  30.  
  31. 	int Count = CountDidit(N);
  32. 	int V = 0;
  33. 	int ret = 0;
  34. 	for (int i = 0; i < Count; i++){
  35. 		V = SnipeDigit(N, i);
  36. 		if (V != 0)L.push_front(V);
  37. 	}
  38. 	int S = L.size();
  39. 	for (int i = 0; i < Count - S; i++){
  40. 		L.push_back(0);
  41. 	}
  42.  
  43. 	for (auto i : L){
  44. 		ret = (ret * 10) + std::abs(i);
  45. 	}
  46. 	return ret*Sign(N);
  47. }
  48.  
  49. int main(){
  50. 	int V = 123456789;
  51. 	int V2 = 1020304050;
  52.  
  53. 	int p = V2;
  54.  
  55. 	int N = MakeHoge(p);
  56.  
  57. 	std::cout << p << "=" << N << std::endl;
  58.  
  59. 	return 0;
  60. }
Success #stdin #stdout 0s 3472KB
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Standard input is empty
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1020304050=1234500000
https://ideone.com/EYHTTE
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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