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  1. #include <iostream>
  2. //using namespace std;
  3.  
  4. unsigned long s = 0x006600; // Green
  5. unsigned long t = 0x000066; // Blue ?
  6. unsigned long f = 0x000000; // Off
  7.  
  8. void parseData( char const * const data )
  9. {
  10.     // try get a decimal number at the start of data
  11.     char * p;
  12.     uint8_t number = (uint8_t)strtoul( data, &p, 10 );
  13.  
  14.     // if strtoul couldn't find a number at the start of data
  15.     if ( p == data )
  16.     {
  17.     	printf( "couldn't find a number!\n" );
  18.     	return;
  19.     }
  20.  
  21.     // else, p is now pointing at the character after the number
  22.  
  23.     // so try increase p until the pointed character is a lowercase letter
  24.     // (to skip spaces and anything else)
  25.     while ( *p && ( *p < 'a' || *p > 'z' ) )
  26.     {
  27.     	p++;
  28.     }
  29.  
  30.     char letter = *p;
  31.  
  32.     // if a lowercase letter wasn't found
  33.     if ( !letter )
  34.     {
  35.     	printf( "couldn't find a letter!\n" );
  36.     	return;
  37.     }
  38.  
  39.     // else, the command is valid, a number and a lowercase letter have been found
  40.  
  41.     printf( "number = %hhu, letter = %c\n", number, letter );
  42.  
  43.     unsigned long color;
  44.     switch ( letter )
  45.     {
  46.     	case 's' :
  47.     	{
  48.     		color = s;
  49.     		break;
  50.     	}
  51.     	case 't' :
  52.     	{
  53.     		color = t;
  54.     		break;
  55.     	}
  56.     	default :
  57.     	{
  58.     		color = f;
  59.     		break;
  60.     	}
  61.     }
  62.  
  63.     printf( "color = 0x%06X\n", color );
  64. }
  65.  
  66.  
  67. int main()
  68. {
  69. 	char command[] = "10 t";
  70. 	parseData( command );
  71.  
  72. 	return 0;
  73. }
Success #stdin #stdout 0s 5684KB
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stdin
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Standard input is empty
stdout
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number = 10, letter = t
color = 0x000066
https://ideone.com/BikuO4
language:
C++ 4.3.2 (gcc-4.3.2)
created:
2 years ago
visibility:
secret

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