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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6.  
  7. 	int var = 0;
  8. 	cin >> var;
  9.  
  10.  
  11. 	int hexNum = sizeof(int) << 1;
  12.  
  13. 	int number = 0;
  14. 	int shift = 0;
  15. 	char symbol = '0';
  16. 	cout << "0x";
  17. 	for(int i=0; i < hexNum; ++i)
  18. 	{
  19. 		shift = (hexNum - i - 1) * 4;
  20. 		number = (var & (0xF << shift)) >> shift;
  21. 		// cout << shift << " " << number << " " << endl;
  22. 		switch(number)
  23. 		{
  24. 			case 0: symbol = '0'; break;
  25. 			case 1: symbol = '1'; break;
  26. 			case 2: symbol = '2'; break;
  27. 			case 3: symbol = '3'; break;
  28. 			case 4: symbol = '4'; break;
  29. 			case 5: symbol = '5'; break;
  30. 			case 6: symbol = '6'; break;
  31. 			case 7: symbol = '7'; break;
  32. 			case 8: symbol = '8'; break;
  33. 			case 9: symbol = '9'; break;
  34. 			case 0xA: symbol = 'A'; break;
  35. 			case 0xB: symbol = 'B'; break;
  36. 			case 0xC: symbol = 'C'; break;
  37. 			case 0xD: symbol = 'D'; break;
  38. 			case 0xE: symbol = 'E'; break;
  39. 			case 0xF: symbol = 'F'; break;
  40. 			default: symbol = '?'; break;
  41. 		}
  42.  
  43. 		cout << symbol;
  44. 	}
  45.  
  46.  
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 3100KB
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stdin
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1024
stdout
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0x00000400
https://ideone.com/fWYMac
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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