c++ - dynamically allocated string arrays failed to be deallocated -

i have following piece of code:

string * p = new string[8]; cout<<sizeof(p)<<endl; free(p); 

which seems ok me failed with:

8 a.out(85837) malloc: *** error object 0x7fb5b3403ae8: pointer being freed not allocated *** set breakpoint in malloc_error_break debug abort trap: 6 

another test on integer array worked. there special c++ string?

yap. new [] pairs delete []. free()ing causes undefined behavior.