int？主()
{?夏爾？c；
scanf("%c "，& ampc)；if(c & gt；='a '？& amp& amp？c & lt='z')c+='A'-'a' printf("%c\n "，c) return？0;}
int？main()？{char？c；Printf("輸入字母:")；scanf("%c "，& ampc)；if(' a ' & lt；=c？& amp& amp？c & lt='z'){c？+=?32;Printf("大寫字母是:%c "，c)；}別的？if(' A ' & lt；=c？& amp& amp？c & lt='Z'){printf("您輸入了大寫字母:%c "，c)；}else{printf("妳沒有輸入字母！\ n ")；}返回？0;}