int ch ; rnBp2'EM
ch=getche() ; ?h,.1Tb
if((ch>='a') && (ch<='z')) wqgKs=y
printf("%c is a lowercase letter\n" ,ch); hbs /S
else if ((ch>='A') && (ch<='Z')) hd)WdGJp
print(" %c is a uppercase letter\n" ,ch); otQ
G6
else if((ch>'0')&&(ch<'9') P[jh^!<j
printf(" %c is a number character between 0 and 9\n" ,ch) ; lz_ r
else c-4z8T#M^
printf("%c is...") q&^H"
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6Ia[`xuL
外面再加个循环就行了