In C++, delete operator should only be used either for the pointers pointing to the memory allocated using new operator or for a NULL pointer, and free() should only be used either for the pointers pointing to the memory allocated using malloc() or for a NULL pointer.

1 #include
     
       2 #include
      
        3 int main() 4 { 5     int x; 6     int *ptr1 = &x; 7     int *ptr2 = (int *)malloc(sizeof(int)); 8     int *ptr3 = new int; 9     int *ptr4 = NULL;10  11     /* delete Should NOT be used like below because x is allocated on stack frame */13     delete ptr1;  14  15     /* delete Should NOT be used like below because x is allocated using malloc() */17     delete ptr2;  18  19     /* Correct uses of delete */20     delete ptr3;21     delete ptr4;22  23     getchar();24     return 0;25 }
      
     

 

 

 

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　　2013-11-26　　10:00:24