String Character Length: Difference between revisions

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char *p = (char *) string;

while (*p != '\0') length ;

while (*p++ != '\0') length++;

return 0;

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}

==[[C plus plus|C ]]==

==[[C plus plus|C++]]==

[[Category:C plus plus|C ]]

[[Category:C plus plus|C++]]

'''Standard:''' [[ISO C plus plus|ISO C ]] (AKA [[C plus plus 98|C 98]]):

'''Standard:''' [[ISO C plus plus|ISO C++]] (AKA [[C plus plus 98|C++98]]):

'''Compiler:''' g 4.0.2

'''Compiler:''' g++ 4.0.2

#include <string> // note: '''not''' <string.h>

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'''Platform:''' [[.NET]]

'''Language Version:''' 1.0

'''Language Version:''' 1.0+

string s = "Hello, world!";

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binary

: utf8 ( str -- str )

: utf8+ ( str -- str )

begin

char

char+

dup c@

11000000 and

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swap dup c@

while

utf8

utf8+

swap 1

swap 1+

repeat drop ;

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Since Java 1.5, the actual number of characters can be determined by calling the codePointCount method.

String str = "\uD834\uDD2A"; //U 1D12A

String str = "\uD834\uDD2A"; //U+1D12A

int length1 = str.length(); //2

int length2 = str.codePointCount(0, str.length()); //1

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var len1 = str1.length; //13

var str2 = "\uD834\uDD2A"; //U 1D12A represented by a UTF-16 surrogate pair

var str2 = "\uD834\uDD2A"; //U+1D12A represented by a UTF-16 surrogate pair

var len2 = str2.length; //2