Thread: left shifting signed quantity

hello all,

this is a quote from K&R pg no. 49

right shifting a signed quantity will fill with sign bits ("arithmetic bits") on some machines and with 0-bits ("logical shift") on others.

is this true for left shift also.is left shifting a signed quantity also machine dependent.
also i wanna know how can i determine whether my system uses ASCII encoding or EBCDIC or some else encoding.my OS is windows xp.
Thank you