int ch ; F5&4x"c
ch=getche() ; nqy\xK#.^
if((ch>='a') && (ch<='z')) 3u-j`7
printf("%c is a lowercase letter\n" ,ch); N'|zPFkg
else if ((ch>='A') && (ch<='Z')) _?`3zm4
print(" %c is a uppercase letter\n" ,ch); (;cbgHo%}
else if((ch>'0')&&(ch<'9') a\^DthZ!;|
printf(" %c is a number character between 0 and 9\n" ,ch) ; fE7[Sk
else GT2;o
printf("%c is...") ;V`~'357%
C %y AMQ
外面再加个循环就行了