|
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Defined in header <wchar.h> | ||
int wcscmp(constwchar_t* lhs,constwchar_t* rhs); | (since C95) | |
Compares two null-terminated wide strings lexicographically.
The sign of the result is the sign of the difference between the values of the first pair of wide characters that differ in the strings being compared.
The behavior is undefined iflhs orrhs are not pointers to null-terminated wide strings.
Contents |
| lhs, rhs | - | pointers to the null-terminated wide strings to compare |
Negative value iflhs appears beforerhs in lexicographical order.
Zero iflhs andrhs compare equal.
Positive value iflhs appears afterrhs in lexicographical order.
This function is not locale-sensitive, unlikewcscoll, and the order may not be meaningful when characters from different Unicode blocks are used together or when the order of code units does not match any collation order.
#include <locale.h>#include <stdio.h>#include <wchar.h> void demo(constwchar_t* lhs,constwchar_t* rhs){int rc= wcscmp(lhs, rhs);constchar*rel= rc<0?"precedes": rc>0?"follows":"equals"; setlocale(LC_ALL,"en_US.utf8");printf("[%ls] %s [%ls]\n", lhs, rel, rhs);} int main(void){constwchar_t* string= L"どうもありがとうございます"; demo(string, L"どうも"); demo(string, L"助かった"); demo(string+9, L"ありがとうございます"+6);}
Possible output:
[どうもありがとうございます] follows [どうも][どうもありがとうございます] precedes [助かった][ざいます] equals [ざいます]
(C95) | compares a certain amount of characters from two wide strings (function)[edit] |
(C95) | compares a certain amount of wide characters from two arrays (function)[edit] |
| compares two strings (function)[edit] | |
(C95) | compares two wide strings in accordance to the current locale (function)[edit] |
C++ documentation forwcscmp | |
