day47：C++ day7，异常处理、using的第三种用法、类型转换、lambda表达式、STL标准模板库

my_vectoers.h:

#ifndef MY_VECTORS_H
#define MY_VECTORS_H
#include 
 
using namespace std;
 
template<typename TYPE>
class my_vectors
{
private:
    TYPE* ptr;
    int num;
    int cnum;
    TYPE* start_ptr=NULL;
    TYPE* end_ptr=NULL;
public:
    //无参构造
    my_vectors(){};
 
    //有参构造
    my_vectors(int num,const TYPE &val1);
 
    //拷贝构造
    my_vectors(const my_vectors &L);
 
    //构造2
    my_vectors(TYPE* start,TYPE* end);
 
    //=运算符重载
    bool operator=(const my_vectors &L);
 
    //>运算符重载
    bool operator>(const my_vectors &L);
 
    //[]运算符重载
    TYPE & operator[](int index);
 
    //assign函数1
    void assign(TYPE* start,TYPE* end);
 
    //assign函数2
    void assign( int num, const TYPE &val2 );
 
    //at函数
    TYPE at( int pos );
 
    //back函数
    TYPE back();
 
    //伪begin函数
    TYPE* begin();
 
    //capacity 函数
    int capacity();
 
    //clear 函数
    void clear();
 
    //empty 函数
    bool empty();
 
    //full 函数
    bool full();
 
    //伪end函数
    TYPE* end();
 
    //front函数
    TYPE front();
 
    //insert函数1
    TYPE* insert( int loc, const TYPE &val );
 
    //insert函数2
    void insert( int loc, int num, const TYPE &val );
 
    //insert函数3
    void insert( int loc, TYPE* start, TYPE* end );
 
    //max_size 函数
    int max_size();
 
    //pop_back函数
    void pop_back();
 
    //push_back 函数
    void push_back( const TYPE &val );
 
    //伪rbegin 函数
    TYPE* rbegin();
 
    //伪rend 函数
    TYPE* rend();
 
    //resize 函数
    void resize( int size, TYPE val );
 
    //size 函数
    int size();
 
    //swap 函数
    void swap( my_vectors &from );
 
    //三杯水
    void swap(TYPE &a,TYPE &b);
 
    //show函数
    void show();
};
 
 
#endif // MY_VECTORS_H

my_vector.cpp:

#include "my_vectors.h"
 
//有参构造
template<typename TYPE>
my_vectors::my_vectors(int num,const TYPE &val1)
{
    this->num=num;
    cnum=num;
    ptr=new TYPE(cnum);
    for(int i=0;i
    {
        ptr[i]=val1;
    }
    start_ptr=ptr;
    end_ptr=ptr+num-1;
}
 
//拷贝构造
template<typename TYPE>
my_vectors::my_vectors(const my_vectors &L)
{
    this->num=L.num;
    cnum=num;
    ptr=new TYPE(cnum);
    memcpy(this,&L,sizeof(my_vectors));
    memcpy(ptr,L.ptr,sizeof(TYPE)*num);
    start_ptr=ptr;
    end_ptr=ptr+num-1;
}
 
//构造2
template<typename TYPE>
my_vectors::my_vectors(TYPE* start,TYPE* end)
{
    num=(end-start)/sizeof(TYPE);
    cnum=num;
    ptr=new TYPE(cnum);
    memcpy(ptr,start,sizeof(TYPE)*num);
    start_ptr=ptr;
    end_ptr=ptr+num-1;
}
 
//=运算符重载
template<typename TYPE>
bool my_vectors::operator=(const my_vectors &L)
{
    if(num == L.num && memcmp(ptr,L.ptr,sizeof(num)) == 0)
    {
        return true;
    }
    return false;
}
 
//>运算符重载
template<typename TYPE>
bool my_vectors::operator>(const my_vectors &L)
{
    if(num > L.num)
    {
        return true;
    }else if(num == L.num && memcmp(ptr,L.ptr,sizeof(num)) > 0)
    {
        return true;
    }else{
        return false;
    }
}
 
//[]运算符重载
template<typename TYPE>
TYPE &my_vectors::operator[](int index)
{
    return *(ptr+index);
}
 
//assign函数1
template<typename TYPE>
void my_vectors::assign(TYPE* start,TYPE* end)
{
    delete []ptr;
    num=(end-start)/sizeof(TYPE);
    cnum=num;
    ptr=new TYPE(cnum);
    memcpy(ptr,start,sizeof(TYPE)*num);
    start_ptr=ptr;
    end_ptr=ptr+num-1;
}
 
//assign函数2
template<typename TYPE>
void my_vectors::assign( int num, const TYPE &val2 )
{
    delete []ptr;
    this->num=num;
    cnum=num;
    ptr=new TYPE(cnum);
    for( int i=0;i
    {
        ptr[i]=val2;
    }
    start_ptr=ptr;
    end_ptr=ptr+num-1;
}
 
//at函数
template<typename TYPE>
TYPE my_vectors::at( int pos )
{
    if(pos>=0&&pos
    {
        return ptr[pos];
    }
    else{
        cout<<"pos error";
    }
}
 
//back函数
template<typename TYPE>
TYPE my_vectors::back()
{
    return *end_ptr;
}
 
//伪begin函数
template<typename TYPE>
TYPE* my_vectors::begin()
{
    return start_ptr;
}
 
//capacity 函数
template<typename TYPE>
int my_vectors::capacity()
{
    return cnum;
}
 
//clear 函数
template<typename TYPE>
void my_vectors::clear()
{
    while(!empty())
    {
        pop_back();
    }
}
 
//empty 函数
template<typename TYPE>
bool my_vectors::empty()
{
    return start_ptr==NULL&&end_ptr==NULL;
}
 
//full 函数
template<typename TYPE>
bool my_vectors::full()
{
    return cnum==num;
}
 
//伪end函数
template<typename TYPE>
TYPE* my_vectors::end()
{
    return end_ptr;
}
 
//front函数
template<typename TYPE>
TYPE my_vectors::front()
{
    return &ptr[0];
}
 
//insert函数1
template<typename TYPE>
TYPE* my_vectors::insert( int loc, const TYPE &val )
{
    if(full())
    {
        cnum*=2;
        TYPE s[num];
        memcpy(s,this,sizeof(TYPE)*num);
        delete []ptr;
        ptr=new TYPE(cnum);
        memcpy(ptr,s,sizeof(TYPE)*num);
    }
    for(int i=ptr+num+1;i>=ptr+loc-1;i--)
    {
        *(ptr+i)=*(ptr+i-1);
    }
    *(ptr+loc-1)=val;
    num++;
    return ptr+loc-1;
}
 
//insert函数2
template<typename TYPE>
void my_vectors::insert( int loc, int num, const TYPE &val )
{
    if(full())
    {
        while(cnum<this->num+num)
        {
            cnum*=2;
        }
        TYPE s[num];
        memcpy(s,this,sizeof(TYPE)*num);
        delete []ptr;
        ptr=new TYPE(cnum);
        memcpy(ptr,s,sizeof(TYPE)*num);
    }
    for(int i=loc-1;i
    {
        *ptr[i]=val;
    }
    num++;
}
 
//insert函数3
template<typename TYPE>
void my_vectors::insert( int loc, TYPE* start, TYPE* end )
{
    int size=(end-start)/sizeof(TYPE);
    if(full())
    {
        while(cnum<this->num+size)
        {
            cnum*=2;
        }
        TYPE s[num];
        memcpy(s,this,sizeof(TYPE)*num);
        delete []ptr;
        ptr=new TYPE(cnum);
        memcpy(ptr,s,sizeof(TYPE)*num);
    }
    TYPE s1[num];
    memcpy(s1,ptr+loc-1,sizeof(TYPE)*(num-loc));
    memcpy(ptr+loc-1,start,sizeof(TYPE)*size);
    memcpy(ptr+loc-1+size,s1,sizeof(TYPE)*(num-loc));
    num++;
}
 
//max_size 函数
template<typename TYPE>
int my_vectors::max_size()
{
    return cnum;
}
 
//pop_back函数
template<typename TYPE>
void my_vectors::pop_back()
{
    if(!empty())
    {
        num--;
        if(num==0)
        {
            start_ptr=NULL;
            end_ptr=NULL;
        }
    }
}
 
//push_back 函数
template<typename TYPE>
void my_vectors::push_back( const TYPE &val )
{
    if(full())
    {
        cnum*=2;
        TYPE s[num];
        memcpy(s,this,sizeof(TYPE)*num);
        delete []ptr;
        ptr=new TYPE(cnum);
        memcpy(ptr,s,sizeof(TYPE)*num);
    }
    *(ptr+num)=val;
    end_ptr++;
    num++;
}
 
//伪rbegin 函数
template<typename TYPE>
TYPE* my_vectors::rbegin()
{
    return end_ptr;
}
 
//伪rend 函数
template<typename TYPE>
TYPE* my_vectors::rend()
{
    return start_ptr;
}
 
//resize 函数
template<typename TYPE>
void my_vectors::resize( int size, TYPE val )
{
    delete[] ptr;
    ptr=new TYPE(size);
    num=size;
    cnum=size;
    for(int i=0;i
    {
        *(ptr+i)=val;
    }
    start_ptr=ptr;
    end_ptr=ptr+size-1;
}
 
//size 函数
template<typename TYPE>
int my_vectors::size()
{
    return num;
}
 
//swap 函数
template<typename TYPE>
void my_vectors::swap( my_vectors &from )
{
    swap(this->ptr,from.ptr);
    swap(this->num,from.num);
    swap(this->cnum,from.cnum);
    swap(this->start_ptr,from.start_ptr);
    swap(this->end_ptr,from.end_ptr);
}
 
//三杯水
template<typename TYPE>
void my_vectors::swap(TYPE &a,TYPE &b)
{
    TYPE temp;
    temp=a;
    a=b;
    b=temp;
}
 
//show函数
template<typename TYPE>
void my_vectors::show()
{
    for(int i=0;i
    {
        cout<<*(ptr+i)<<"\t";
    }
    cout<
}

main.c:

#include "my_vectors.cpp"
int main()
{
    my_vectors<int> a;
    my_vectors<int>b(5,9);
    cout<empty()<
    cout<full()<
    b.show();
    b.pop_back();
    b.pop_back();
    b.push_back(55);
    b.push_back(55);
    b.show();
    cout<at(3)<
    b.clear();
    cout<empty()<
    return 0;
}

思维导图：有道云笔记