int ch ; E3j`e>Yz
ch=getche() ; :$K=LV#Iru
if((ch>='a') && (ch<='z')) lq_UCCnv5
printf("%c is a lowercase letter\n" ,ch); C=o-3w
else if ((ch>='A') && (ch<='Z')) Pd&KAu|<`
print(" %c is a uppercase letter\n" ,ch); )-5e Iy
else if((ch>'0')&&(ch<'9') M&/4SVBF
printf(" %c is a number character between 0 and 9\n" ,ch) ; 9yTdbpY
else tKUW
printf("%c is...") | 8mWR=9fs
akr2Os
外面再加个循环就行了