C++(day7)

思维导图

 Vector

#include 
 
using namespace std;
 
template <typename V>
class Myvector{
private:
    V *data;
    int Capacity;
    int Size;
public:
    //无参构造
    Myvector():data(new V[Capacity]),Capacity(0),Size(0){
        cout<<"无参构造函数"<
    }
    //有参构造
    Myvector(int c,int s):Capacity(c),Size(s){
        data=new V[Capacity];
        cout<<"有参构造函数"<
    }
    //析构函数
    ~Myvector(){
        delete []data;
        cout<<"析构函数"<
    }
    //拷贝构造函数
    Myvector(const Myvector &other):data(new V[other.Capacity]),Capacity(other.Capacity),Size(other.Size){
        for (int i = 0; i < Size; i++) {
            data[i] = other.data[i];
        }
        cout<<"拷贝构造函数"<
    }
    //拷贝赋值函数
    Myvector &operator= (const Myvector &other){
        if(this!=&other){
            this->Capacity=other.Capacity;
            this->Size=other.Size;
        }
        if(this->data!=NULL){
            delete this->data;
        }
        this->data=new V(*other.data);
        for (int i = 0; i < Size; i++) {
            data[i] = other.data[i];
        }
        cout<<"拷贝赋值函数"<
        return *this;
    }
    //判空函数
    bool empty(){
        return 0==Size;
    }
 
    //capacity函数
    int capacity(){
        return Capacity;
    }
 
    //size函数
    int size(){
        return Size;
    }
    //插入函数
    void insert(int pos,V e){
 
        if(pos<0||pos>Size){
            throw string("下标不能小于0,不能超过Size");
        }
        else{
            if(Size==Capacity){
                V* temp=new V[Capacity*2];
                for (int i = 0; i < Size; i++) {
                    temp[i] = data[i];
                }
                delete this->data;
                this->data=temp;
                this->Capacity*=2;
            }
            for(int i=Size;i>pos;i--){
                data[i]=data[i-1];
            }
            data[pos]=e;
            Size++;
        }
        cout<<"插入成功"<
 
    }
 
    //show函数
    void show(){
        for(int i=0;i
            cout<'\t';
        }
        cout<
    }
};
 
int main()
{
    Myvector<int> v(5,0);
    cout<<"容量："<capacity()<
    cout<<"元素数量："<size()<
    v.insert(0,1);
    v.insert(0,2);
    v.insert(0,3);
    v.insert(0,4);
    v.insert(0,5);
    v.show();
    v.insert(0,6);
    cout<<"容量："<capacity()<
    cout<<"元素数量："<size()<
    v.insert(0,7);
    v.insert(0,8);
    v.insert(0,9);
    v.insert(0,10);
    v.insert(0,11);
    v.insert(0,12);
    cout<<"容量："<capacity()<
    cout<<"元素数量："<size()<
    v.show();
    return 0;
}