c++this指针问题

问题
在含参构造函数中
this->m_arry = new T[this->m_capacity];
请问一下[]中的this->m_capacity前面加了后为什么说我非法间接寻址
this->m_arry是m_arry的地址
[]中不是要填一个值吗，然后我就在this->m_capacity前面加了个进行解引用但是系统报错删了就不报错了

#include 
using namespace std;

template<class T>
class fruit
{
public:
    fruit(int capacity){
        cout << "构造函数" << endl;
        this->m_capacity = capacity;
        this->m_size = 0;
        this->m_arry = new T[this->m_capacity];
    }

    fruit(const fruit&p){
        this->m_capacity = p.m_capacity;
        this->m_size = p.m_size;
        this->m_arry = new T[p.m_capacity];
        for (int i=0; i < this->m_size; i++)
        {
            this->m_arry[i] = p.m_arry[i];
        }
    }
    fruit& operator=(const fruit&p){
        cout << "operato=函数重载" << endl;
        if (this->m_arry != NULL)
        {
            delete[]this->m_arry;
            this->m_arry = NULL;
            this->m_capacity = 0;
            this->m_size = 0;
        }

        this->m_size = p.m_size;
        this->m_capacity = p.m_capacity;
        this->m_arry = new T[p.m_capacity];
        for (int i=0; i < this->m_size; i++)
        {
            this->m_arry[i] = p.m_arry[i];
        }
        return *this;
    }

    ~fruit()
    {
        if (this->m_arry != NULL)
        {
            delete[]this->m_arry;
            this->m_arry = NULL;
        }
    }

    
private:
    //数组容量
    int m_capacity;
    //数组元素个数
    int m_size;

    T* m_arry;
}

this->m_arry = new T[this->m_capacity];
m_capacity本来就是int类型，直接用就可以了啊，你为啥要加*号呢？