Print out decimal and hexadecimal values of input string characters.

Usage:

./ascii "Hello World!"

CHAR	DEC	HEX
'H'	72	0x48
'e'	101	0x65
'l'	108	0x6c
'l'	108	0x6c
'o'	111	0x6f
' '	32	0x20
'W'	87	0x57
'o'	111	0x6f
'r'	114	0x72
'l'	108	0x6c
'd'	100	0x64
'!'	33	0x21