2012年8月27日 · As always, RTFM before using a function. Even the C standard is blatantly clear over how strcmp() behaves: The strcmp function returns an integer greater than, equal to, or less than zero, accordingly as the string pointed to by s1 is greater than, equal to, or less than the string pointed to by s2. That's it, no further guarantees. –

2016年1月16日 · To quote the man page: The strcmp() and strncmp() functions return an integer less than, equal to, or greater than zero if s1 (or the first n bytes thereof) is found, respectively, to be less than, to match, or be greater than s2.

2017年6月2日 · Normally strcmp is used with two arguments [e.g. strcmp(str1,"garden")], and it will return 0 if both are the same. Is it possible to compare part of the input, say the first five character of the...

2017年3月27日 · According to the C Standard (7.23.4.2 The strcmp function) 3 The strcmp function returns an integer greater than, equal to, or less than zero , accordingly as the string pointed to by s1 is greater than, equal to, or less than the string pointed to by s2.

I was assigned by my teacher to write my own strcmp() function in C. I did create my own version of said function, and I was hoping to get some feedback. int CompareTwoStrings ( char *StringOne, char *StringTwo ) { // Evaluates if both strings have the same length.

2009年8月31日 · 7.21.4/1 (C99), emphasis is mine: The sign of a nonzero value returned by the comparison functions memcmp, strcmp, and strncmp is determined by the sign of the difference between the values of the first pair of characters (both interpreted as unsigned char) that differ in the objects being compared.

2013年5月15日 · fgets will return a string which ends with a newline (\n).From its documentation. Reads characters from stream and stores them as a C string into str until (num-1) characters have been read or either a newline or the end-of-file is reached, whichever happens first.

C99 7.21.4:. The sign of a nonzero value returned by the comparison functions memcmp, strcmp, and strncmp is determined by the sign of the difference between the values of the first pair of characters (both interpreted as unsigned char) that differ in the objects being compared.

2016年4月9日 · It is defined in the C standard as the difference between the first two non matching characters, but the implementation is wild. The only common point is that the return value is zero for equal strings, then respectively <0 or >0 for str1<str2 and str1>str2. From ISO/IEC 9899:201x, §7.23.4 Comparison functions:

2014年3月22日 · Only when "comparing" string_a and string_c using == would return true. If you want to compare the actual contents of two C-string but not whether they are just alias of each other, use strcmp. For a side note: if you are using C++ instead of C as your question tag shows, then you should use std::string. For example,