34.用指针删除堆中的内存空间

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#include <iostream>
& E: J4 p3 y8 L/ o7 t# zusing namespace std;
# k' V* q# w9 [4 D. g; ~int main(void)
" G7 \& b( ^* u/ e8 c{
( D8 q# F  m( `/ n/ ?; c! j+ E int *p=new int;
*p=1;
6 `( r# a  V7 n8 G% z8 h8 a cout<<*p<<endl;
delete p;
1 R% U; z' v! k% h, \. E cout<<*p<<endl;
p=0;
p=new int;
*p=2;
cout<<*p<<endl;
2 i0 `1 b2 D- z( |; a delete p;
+ d8 j: c5 E% P+ n return 0;
& h1 P" U( Y  N# t, G3 Z}