But it doesn't. The implisit conversion will sign extend the char to an int when char is passed as a single arguement.Originally Posted by QuantumPete
String and character literal escapes must be spesified as unsigned octal or hex, but that has nothing to do with printf.
Printing functions don't care about the sign of a character, because they just map each set of eight bits to a symbol. Signed or unsigned these bits still have the same mapping.
It is too clear and so it is hard to see.
A dunce once searched for fire with a lighted lantern.
Had he known what fire was,
He could have cooked his rice much sooner.
But then the corresponding %c argument is converted to unsigned char after being converted to int.
Last edited by robwhit; 09-10-2008 at 07:32 PM.
Hm. Well if the standard says that then I guess it's true. But its odd that they specify that considering that it makes no difference what so ever, except perhaps that code pages are commonly listed as unsigned values.
It is too clear and so it is hard to see.
A dunce once searched for fire with a lighted lantern.
Had he known what fire was,
He could have cooked his rice much sooner.
