C++ 创建结构体数组

下面是一段示例

#include <stdio.h>
#include <stdio.h> 
#include <stdio.h> 
#include <stdio.h> 
#include <iostream>
#include <map>
#include <stdlib.h>

using namespace std;

struct result{
        char a[100];
        map<char * , u_int64_t> mymap;
        struct result *next;
};

int main()
{
    struct result *head = (struct result *)
                malloc(sizeof(struct result));
    cout << (head->mymap).size() << endl;
    free(head);

    result **a = new result*[10];
    for(int i = 0 ;i < 10 ; i++)
    {
     a[i] = new result;
     cout << (a[i]->mymap).size() << endl;
    }
    delete[] a;

}