strncmp() Compare two strings, up to a given length. Synopsis: #include int strncmp( const char* s1, const char* s2, size_t n); Arguments: s1, s2 The strings that you want to compare. n The maximum number of characters that you want to compare. Library: libc. Use the -l c option to qcc to link against this library. This library is

FreeBSD Man Pages: strcmp - compare strings The strcmp() and strncmp() functions lexicographically compare the null- terminated strings s1 and s2. The strncmp () function compares not more than len characters. Because strncmp () is designed for comparing strings rather than binary data, characters that appear after a `\0' character are not compared. Is NULL a valid parameter for the strcmp()? - cppbuilder to by its parameters. If the pointers don't point to strings, then you aren't comparing strings, and the function is fully entitled to fail. NULL never points to a string, and strcmp() is fully permitted to blow strncmp() -- compare part of two strings

This function is similar to strcmp(), with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison.. Note that …

The strncmp() function is similar, except it compares only the first (at most) n bytes of s1 and s2. RETURN VALUE ¶ 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 … FreeBSD Man Pages: strcmp - compare strings The strcmp() and strncmp() functions lexicographically compare the null- terminated strings s1 and s2. The strncmp () function compares not more than len characters. Because strncmp () is designed for comparing strings rather than binary data, characters that appear after a `\0' character are not compared.

CS50 Programmer's Manual - man.cs50.io

The GNU C Reference Manual 1.1 Identifiers. Identifiers are sequences of characters used for naming variables, functions, new data types, and preprocessor macros. You can include letters, decimal digits, and the underscore character ‘_’ in identifiers. The first character of an identifier cannot be a digit.