int ch ; P2RL\`<"
ch=getche() ; l hp:.
if((ch>='a') && (ch<='z')) $
rnr;V
printf("%c is a lowercase letter\n" ,ch); q8v!{Os+#
else if ((ch>='A') && (ch<='Z')) Guc^gq}
print(" %c is a uppercase letter\n" ,ch); G'C^C[_W
else if((ch>'0')&&(ch<'9') SLA~F?t
printf(" %c is a number character between 0 and 9\n" ,ch) ; N!&VBx^z
else zvC,([
printf("%c is...") OWfj<#}t+
`;2`H, G'
外面再加个循环就行了