Which standard library function compares two strings for equality?

Question

BlackTom AI · Accepted Answer

Question: Which standard library function compares two strings for equality?

Option 1: strcmp
Explanation: strcmp is the standard function used to compare two strings lexicographically; it returns 0 when the strings are equal, and a nonzero value when they differ. This behavior directly addresses equality testing between strings, which is what the question asks for.

Option 2: strcpy
Explanation: strcpy copies the contents of one string into another buffer. It does not perform any comparison between the two strings, so it does not answer the question about equality testing.

Option 3: strlen
Explanation: strlen computes the length of a string, i.e., the number of characters before the terminating null character. It does not compare two strings for equality, only measures length.

Option 4: strncmp
Explanation: strncmp compares up to n characters of two strings and can be used to check for equality within a fixed limit. While it can determine equality for the first n characters, it is not the standard function designated solely for equality testing of entire strings unless you specify the full length of both strings; the question asks for the standard library function that compares two strings for equality in general, for which strcmp is the typical and direct choice.

Which standard library function compares two strings for equality?

查看解析

登录即可查看完整答案

类似问题

Question at position 7 What is the value of the variable Flag at the end of the following lines of code: Flag = 1Flag = 0Code will not run. Error!Flag is the ASCII equivalent of the word 'Toney'

Consider the following code segment: s1 = "CAT"s2 = "cat"Which of the following if statements has a condition that evaluates to True?

Review the code snippet below: name1 = "Betty joe"name2 = "Betty Jean"name3 = "Betty Jane"if name1 < name2 : if name1 < name3 : print(name1, "is first") else : print(name3, "is first")else : if name2 < name3 : print(name2, "is first") else : print(name3, "is first") what output is produced?

Consider the following code segment: s1 = "CAT" s2 = "cat" Which of the following if statements has a condition that evaluates to True?

Review the code snippet below: name1 = "Betty joe" name2 = "Betty Jean" name3 = "Betty Jane" if name1 < name2 : if name1 < name3 : print(name1, "is first") else : print(name3, "is first") else : if name2 < name3 : print(name2, "is first") else : print(name3, "is first") what output is produced?

Logical Comparison with string data (R uses "character" to refer to a string data): It is based on alphabetical ordering. If one string comes later in alphabetical order than another, it is considered greater. Question: Which of the following comparisons result in TRUE?

"A"<"a" evaluates to True?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单