int ch ; >B!E 6ah
ch=getche() ; |-a5|3
if((ch>='a') && (ch<='z')) ~:'tp28?
printf("%c is a lowercase letter\n" ,ch); 1hp`.!3]H
else if ((ch>='A') && (ch<='Z')) ?#YheML?
print(" %c is a uppercase letter\n" ,ch); :PE{2*
else if((ch>'0')&&(ch<'9') Qz=F
nR
printf(" %c is a number character between 0 and 9\n" ,ch) ;
U*!q@g_
else ^a^bsKW
printf("%c is...") Ti$G2dBO
WK)hj{k
外面再加个循环就行了