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  1. #include <iostream>
  2.  
  3. uint8_t hexCharToNumber( char c )
  4. {
  5. 	uint8_t number = UINT8_MAX;
  6.  
  7.     if      ( c >= '0' && c <= '9' ) number = c - '0';
  8.     else if ( c >= 'a' && c <= 'f' ) number = c - 'a' + 10;
  9.     else if ( c >= 'A' && c <= 'F' ) number = c - 'A' + 10;
  10.  
  11.     return number;
  12. }
  13.  
  14. int main()
  15. {
  16. 	const char * s = "65D0F7758B094114AFA6D33A5EA0716A";
  17. 	const char * p = s;
  18.  
  19. 	uint8_t array[16];
  20. 	uint8_t index = 0;
  21. 	bool error = false;
  22.  
  23. 	while ( *p != '\0' )
  24. 	{
  25. 		char c1 = *p++;
  26. 		char c2 = *p++;
  27.  
  28. 		if ( c2 == '\0' || index == 16 )
  29. 		{
  30. 			error = true;
  31. 			break;
  32. 		}
  33.  
  34. 		array[ index++ ] = ( hexCharToNumber( c1 ) << 4 ) | hexCharToNumber( c2 );
  35. 	}
  36.  
  37. 	if ( error == true || index < 16 )
  38. 	{
  39. 		printf( "error\n" );
  40. 	}
  41. 	else
  42. 	{
  43. 		for (uint8_t i = 0; i < index; ++i )
  44. 		{
  45. 			printf( "%02X\n", array[i] );
  46. 		}
  47. 	}
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 0.01s 5444KB
comments (?)
stdin
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Standard input is empty
stdout
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65
D0
F7
75
8B
09
41
14
AF
A6
D3
3A
5E
A0
71
6A
https://ideone.com/w7ViNp
language:
C++ 4.3.2 (gcc-4.3.2)
created:
2 years ago
visibility:
secret

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