在以下代码中:
int main(int argc,char * argv[]){
int * ptr;
ptr = 0; // tried also with NULL , nothing changes
ptr = new int[10]; // allocating 10 integers
ptr[2] = 5;
ptr[15] = 15; // this should cause error (seg fault) - but it doesn't
cout << ptr[2] << endl;
cout << ptr[15] << endl; // no error here
delete [] ptr;
cout << ptr[2] << endl; // prints the value 5
cout << ptr[15] << endl; // prints the …