2021-10-20

macO下C++ delete堆指针并不会真的删除指针的指向地址和改地址中保存的值，仅标记为空闲的内存。

void heapDemo() {
    
    int *pointer = pointerfunc();
    
    cout << pointer << endl;
    cout << pointer << endl;
    cout << pointer << endl;
    delete pointer;
    int *p2 = new int(11);
    cout << "p2 = " << p2 << endl;
    delete p2;
    cout << "delete p2 = " << p2 << endl;
}

int * pointerfunc() {
    //在堆区创建整形数据
    //new返回的是该数据类型的指针
    int * pointer = new int(11);
    return pointer;
}

输出

0x10524b300
0x10524b300
0x10524b300
p2 = 0x10524b300
delete p2 = 0x10524b300