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c++resizetchar

Re-'new' TCHAR* array

will a re-new of a TCHAR* array has negative/undefined effect? Or even maybe not recommended? Below code has been working fine so far. Need inputs. Thanks!

//e.g.
TCHAR *tc1 = new TCHAR[1];

// later:

//resize TCHARs
tc1 = new TCHAR[size1];
tc1[size1] = { L'\0' };
Solution

  • This is a memory leak. You need to delete anything created by a new call. If you do that, everything is fine:

    //e.g.
TCHAR *tc1 = new TCHAR[1];

// later:

//resize TCHARs
delete [] tc1; 
tc1 = new TCHAR[size1];
tc1[size1] = { L'\0' };

    Although on an unrelated note, your last line is writing behind the array you allocated. That's not fine. But it has nothing to do with your allocation of memory, it's a mistake on it's own.

    A lot of this can be avoided if you use a string class. Either std::string or if you are using the MFC, CString.