int ch ; PO%yWns30o
ch=getche() ; 9?}rpA`P
if((ch>='a') && (ch<='z')) I?> -
printf("%c is a lowercase letter\n" ,ch); -;@5Ua1uf
else if ((ch>='A') && (ch<='Z')) zNsL^;uT
print(" %c is a uppercase letter\n" ,ch); /4"S}P>f
else if((ch>'0')&&(ch<'9') AG$-U2ap
printf(" %c is a number character between 0 and 9\n" ,ch) ; ltr;pc*)
else {o5K?Pb
printf("%c is...") Iu1Sj`A
cP#]n)<
外面再加个循环就行了