题目内容
(请给出正确答案)
[单选题]
判断一个 char型变量ch是否为数字字符的正确表达式为()。
A.(ch>=0) &&(ch<=9)
B.('0'<=ch<='9')
C.(ch>='0') && (ch<='9')
D.(ch>='0'&&ch<='9')
提问人:网友chinalex
发布时间:2022-01-06
A.(ch>=0) &&(ch<=9)
B.('0'<=ch<='9')
C.(ch>='0') && (ch<='9')
D.(ch>='0'&&ch<='9')
判断 char 型变量 ch 是否为大写字母的正确表达式是:
A.'A' <= ch<='Z'
B.(ch >= 'A') & (ch <='Z')
C.(ch >= 'A') && (ch <='Z')
D.('A' <= ch) and ('z'>= ch)
(A)'A'<=ch<='Z' (B)(ch>='A')&fch<='Z')
(C)(ch>='A')&&(ch<='Z') (D)('A'<=ch)AND('Z'>=ch)
A.'A'<=ch<='Z'
B.(ch>='A')&(ch<='Z')
C.(ch>='A')&&(ch<='Z')
D.('A'<=ch)AND('Z'>=ch)
A.ˊAˊ <=ch<= ˊzˊ>
B.(ˊAˊ <=ch) and (ˊzˊ>=ch)
C.(ch>= ˊAˊ )&(ch<= ˊzˊ )>
D.(ch>= ˊAˊ )&&(ch<= ˊzˊ )>
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