How do i add two LPWSTR ?

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Hi, is there a way to add two LPWSTR and the result will also be LPWSTR ?

like...

C++

LPWSTR str1 = L"Hello ";
LPWSTR str2 = L"World";

LPWSTR str3 = str1 + str2;

MessageBoxW(0, str3, L"title", 0);

Posted 27-Apr-13 0:08am

Ronni2013

Updated 30-Mar-20 7:39am

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3 solutions

Solution 2

try with the concept of string concatenation.
we have strcat and some more methods to concatenate two strings.
Please have a look at that once.

Posted 29-Apr-13 21:02pm

P Uday kishore

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OriginalGriff · Accepted Answer · 2013-04-27T00:15:00

Solution 1

You don't do it with plus!

You need wcsncat: http://msdn.microsoft.com/en-us/library/tbyd7s1y.aspx[^]

Posted 27-Apr-13 0:15am

OriginalGriff

Comments

Member 13593880 2-Jan-18 14:38pm

what is reason with plus operator with

LPWSTR str1 = L"Hello ";
LPWSTR str2 = L"World";
LPWSTR str3 = str1 + str2;
MessageBoxW(0, str3, L"title", 0);

Member 13593880 2-Jan-18 14:39pm

why above is not running

OriginalGriff 3-Jan-18 2:24am

Because adding pointers is meaningless.
Think of a pointer as a phone number: If I add your phone number to mine, what do I get? Who do I speak to if I dial that?
Pointers are the same thing - you can't add them together and expect to get a string result.

CPallini · Accepted Answer · 2013-04-29T21:34:00

Solution 3

Adding the pointers that way is just a mistake. Adding two wstring objects makes the magic:

C++

#include <string>
#include <iostream>
#include <Windows.h>

using namespace std;
int main()
{
    LPWSTR str1 = L"Hello ";
    LPWSTR str2 = L"World";

    wstring w1(str1);
    wstring w2(str2);
    wstring w3 = w1+w2;
    wcout << w3 << endl;
}

Posted 29-Apr-13 21:34pm

CPallini

Comments

Member 13593880 2-Jan-18 14:39pm

what is reason with plus operator with

LPWSTR str1 = L"Hello ";
LPWSTR str2 = L"World";
LPWSTR str3 = str1 + str2;
MessageBoxW(0, str3, L"title", 0);

Member 11469095 30-Mar-20 13:43pm

LPWSTR str1 = L"Hello ";
LPWSTR str2 = L"World";
wstring w1(str1);
wstring w2(str2);
wstring w3 = w1 + w2;
MessageBoxW(0, w3.c_str(), L"title", 0);