int ch ; O
=0j I
ch=getche() ; gUHx(Fi[4
if((ch>='a') && (ch<='z')) }C!g x6
printf("%c is a lowercase letter\n" ,ch); j`:D BO&)\
else if ((ch>='A') && (ch<='Z')) Z,1b$:+
print(" %c is a uppercase letter\n" ,ch); GvI8W)d3,R
else if((ch>'0')&&(ch<'9') S:8 WBY] M
printf(" %c is a number character between 0 and 9\n" ,ch) ; X<mlaXwrA
else eI3ZV^_Ps
printf("%c is...") Q%!Dk0-)
}BI|M_q.1~
外面再加个循环就行了