C++指针与数组

#include <iostream>
#include "Node.cpp"
using namespace std;

int main()
{
    std::cout << "Hello World!\n";

    int a[5], * p;
    int sum, i;

    a[0] = 1;
    a[1] = 2; 
    a[2] = 3;
    a[3] = 4;
    a[4] = 5;

    for ( sum = a[0],i = 1; i < 5; i++)
    {
        sum += a[i];
    }

    sum = 0;
    
    for (sum = *a, i = 1; i < 5; i++)
    {
        sum += *(a + i);
    }
    
    sum = 0;

    for (sum = *a, p = a + 1; p < a + 5; p++)
    {
        sum += *p;
    }
    //a+1 等同于&a[1]

    p = new int[10];

    delete[]p;

    Node node1("Roger", 20), node2(node1);

    strcpy_s(node2.name, sizeof("Wendy"), "Wendy");

    node2.age = 30;

    cout << node1.name << ' ' << node1.age << '  ' << node2.name << '  ' << node2.age;

    node1 = node2;

    /*free(node1.name);
    free(node2.name);*/
}

 

#include <string.h>
#include <corecrt_malloc.h>
struct Node
{
    char* name;
    int age;
public:
    Node(char* n = " ", int a = 0)
    {
        name = _strdup(n);
        age = a;
    }

    ~Node()
    {
        if (name != 0)
        {
            free(name);
        }
    }

    Node(const Node& n) 
    {
        name = _strdup(n.name);
        age =n.age;
    }

    Node& operator =(const Node& n) 
    {
        if (this != &n)
        {
            if (name != 0)
            {
                free(name);
            }

            name = _strdup(n.name);
            age = n.age;
        }

        return *this;
    }
};