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计算机基础与程序设计单选题中等

在C语言中,用于计算字符串长度的函数是?

0{ "key": "A", "text": "strlen()" }
1{ "key": "B", "text": "length()" }
2{ "key": "C", "text": "sizeof()" }
3{ "key": "D", "text": "strleng()" }