c++ - How can I delete dynamic array pointer correctly -

c++ - How can I delete dynamic array pointer correctly -

possible duplicate: c++ delete - deletes objects can still access data? why doesn't delete destroy anything?

i've created dynamic array, , added values ​​to values ​​of array that.

int *parr; parr = new int[10]; for(int i=0;i<10;i++){ parr[i] = i+2; } delete[] parr; // after deletion can find value of array items. cout << parr[5] << endl;

as see in code above , in lastly line, can output 5th element in array without problem . supposed array has been removed.

to show memory can used again, consider expansion of code:

int *parr; parr = new int[10]; for(int i=0;i<10;i++){ parr[i] = i+2; } delete[] parr; int *parr2; parr2 = new int[10]; for(int i=0;i<10;i++){ parr2[i] = (2*i)+2; } cout << parr[5] << endl;

that prints out 12 me. i.e. value parr2[5] actually. or @ to the lowest degree should machine specific compiler & version, etc. others have pointed out undefined behaviour. illustration shows @ to the lowest degree 1 kind of undefined behaviour.

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