int ch ; $0iz;!w
ch=getche() ; .R biF
if((ch>='a') && (ch<='z')) &<.Z4GxS
printf("%c is a lowercase letter\n" ,ch); mxGvhkj
else if ((ch>='A') && (ch<='Z')) o.}^6.h"
print(" %c is a uppercase letter\n" ,ch); &&JI$x0;
else if((ch>'0')&&(ch<'9') <fs2;
printf(" %c is a number character between 0 and 9\n" ,ch) ; klJDYFX=HK
else QF[9Zn
printf("%c is...") q w|M~vdm
EzzzH(!j
外面再加个循环就行了