int ch ; +[M6X}
TQ
ch=getche() ; o*-)Tq8GHE
if((ch>='a') && (ch<='z')) @P#N2:jwj
printf("%c is a lowercase letter\n" ,ch); w^Sz#_2
else if ((ch>='A') && (ch<='Z')) CNih6R
print(" %c is a uppercase letter\n" ,ch); U_Vs.M.p
else if((ch>'0')&&(ch<'9') `tBgH_$M
printf(" %c is a number character between 0 and 9\n" ,ch) ; Yrb{ByO&
else C].iCxn
printf("%c is...") 3DzMB?I
)Q=_0;#;k
外面再加个循环就行了