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int* pArr = new int[10];
delete []pArr;
pArr = new int[50];
delete []pArr;
int* pArr = NULL;
pArr = new int[10];
if (NULL != pArr)
{
delete []pArr;
pArr = NULL;
}
pArr = new int[50];
if (NULL != pArr)
{
delete []pArr;
pArr = NULL;
}