C / C++ / MFC

m_StVector.clear()

struct TestStruct {
   TestStruct() : tchTemp(0) {} // constructor initializes string pointer to 0
   ~TestStruct() { delete [] tchTemp; } // destructor frees string if needed
   void set(const TCHAR* stringvalue) {
      delete [] tchTemp; // release previously allocated memory
      if (stringvalue != 0) {
         // create a copy
         tchTemp = new TCHAR[_tcslen(stringvalue)+1];
         _tcscpy(stringvalue, tchTemp);
      }
      else {
         // reset pointer to 0
         tchTemp = 0;
      }
   }
   TCHAR* tchTemp;
};

void test() {
   std::vector<TestStruct> struct_vect;
   // now fill vector and work with it
   // ...
   struct_vect.clear(); // will delete and deconstruct all objects
}

Madan Chauhan wrote:

All the nodes become free but one that is very first node in the list does not free.

Madan Chauhan wrote:

Please give me some idea...

void main( void )
{
    for (int i = 0; i < 2; i++)
    {
        TEST_STRUCT *ptrCurrent;
        TEST_VECTORST wVectorSt = {0};
        wVectorSt.nVal = i + 1;
   
        for (int j = 0; j < 10; j++)
        {
            TEST_STRUCT *ptrTemp = (TEST_STRUCT *) calloc(1, sizeof(TEST_STRUCT));
            _tcscpy_s(ptrTemp->_tchTemp, _countof(ptrTemp->_tchTemp), _T(""));
            ptrTemp->dwTemp = 10 + j;
            ptrTemp->i64Temp = 100 + j;
            ptrTemp->Next = NULL;
  
            if (wVectorSt.m_ListInVector == NULL)
                wVectorSt.m_ListInVector = ptrTemp;
            else
                ptrCurrent->Next = ptrTemp;
  
            ptrCurrent = ptrTemp;
        }
  
        m_StVector.push_back(wVectorSt);
    }
  
    for (unsigned int i = 0; i < m_StVector.size(); i++)
    {
        TEST_STRUCT *ptrList = m_StVector[i].m_ListInVector;
        while (ptrList != NULL)
        {
            TEST_STRUCT *ptrTemp = ptrList;
            ptrList = ptrList->Next;
            free(ptrTemp);
        }
    } 
}

CString str(array);

CString str(array);

VCProgrammer wrote:

char array[620];
CString str(array,620);