判断char型变量ch是否为大写字母的正确表达式是?
选项A:('A' <=ch<='Z'
选项B:(ch> = 'A')&(ch<='Z')
选项C:(ch>='A' )&&(ch<='Z')
选项D:('A' < = ch)AND('Z'> = ch)
正确答案:选项C