int ch ; m<X[s
ch=getche() ; gL:Vj%c
if((ch>='a') && (ch<='z')) Z>si%Npm\
printf("%c is a lowercase letter\n" ,ch); d^sm;f
else if ((ch>='A') && (ch<='Z')) P@wu k1
print(" %c is a uppercase letter\n" ,ch); 2/W5E-tn
else if((ch>'0')&&(ch<'9') FbWcq_
printf(" %c is a number character between 0 and 9\n" ,ch) ; JgmX=6N
else ~DYv6-p%
printf("%c is...") . h7`Q{
Z/f%$~Ch
外面再加个循环就行了