int ch ; fg
s!v7
ch=getche() ; #eQJEajv5
if((ch>='a') && (ch<='z')) rEv@YD
printf("%c is a lowercase letter\n" ,ch); 2gc/3*F8
else if ((ch>='A') && (ch<='Z')) gaQdG=G8$
print(" %c is a uppercase letter\n" ,ch); 48c1gUwoP
else if((ch>'0')&&(ch<'9') .|hf\1_J
printf(" %c is a number character between 0 and 9\n" ,ch) ; fo5iJz"Z
else t'?.8}?)I&
printf("%c is...") 3)8QS
b$4"i XSQ
外面再加个循环就行了