c++ - Interesting behavior with dynamically allocated array -



c++ - Interesting behavior with dynamically allocated array -

so i'm working dynamically allocated array, , i've set hold 5 elements, should 0-4. made function reserve if necessary, wanted see if getting programme crash expected when assigned value array @ [5]. but, no error, not until [6].

here's code:

int* dynamic_arr; dynamic_arr = new int[5]; for(int = 0; <= 100; i++){ dynamic_arr[i] = i; used++; cout << dynamic_arr[i]<<endl; }

here's output:

0 //i[0] 1 //i[1] 2 //i[2] 3 //i[3] 4 //i[4] 5 //i[5] <-- should out of range

after crashes.

why able assign value portion of array is, well, out of range lack of improve term?

thanks

opsrcftw

edit: appreciate answers guys, thanks. i'll read more before posting quick reply next time, sorry.

accessing beyond end of array produces undefined behavior. not produce crash. can happen.

c++ arrays dynamic

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