44 lines
840 B
C++
44 lines
840 B
C++
#include <iostream>
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#include <cstdlib>
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using namespace std;
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class A
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{
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private:
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string name;
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public:
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A()
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{
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cout << "A()" << endl;
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name = "no name";
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}
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A(const string &name)
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{
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cout << "A(const string &name)" << endl;
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this->name = name;
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cout << "name: " << name << endl;
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}
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~A()
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{
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cout << name << "~A()" << endl;
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}
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};
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int main()
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{
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// A *p = new A[5];
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// delete[] p;
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// A *p2 = new A[4]{A("a"), A("b"), A("c"), A("d")};
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// delete[] p2; // 释放数组中成员对象时，从高(地址)到低(地址)依次释放
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A *a = new A("abc");
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free(a); // 只是放指针指向的堆空间，不会调用对象的析构函数
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char *a2 = (char *)malloc(sizeof(A));
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delete a2; // 可以删除简单的 void* 指针
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return 0;
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}
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