嵌入式学习Day35（c++）

#include 
#include 
#include 


using namespace std;
class mystring
{
private:
    char *str;  //存储字符串
    int size;   //记录字符串长度

public:
    mystring():size(10)   //无参构造
    {
        str=new char[size];
        cout<<"无参构造"<=size)
        {
            cout<<"超出字符串范围"<size=other.size;
            this->str=new char[size+1];
            strcpy(this->str,other.str);
        }

        return *this;
    }
    //重载[]
    char &operator[](const int pos)
    {
        return this->str[pos];
    }

    //重载+
     const mystring operator+(const mystring &R)const
    {
        mystring temp;

        temp.size=this->size+R.size;
        temp.str=new char[temp.size+1];
        strcpy(temp.str,this->str);
        strcat(temp.str,R.str);

        return temp;

    }

    //重载<
    bool operator<(const mystring &R)const
    {
        if(strcmp(this->str,R.str)<0)
            return true;
        return false;
    }
   
    //重载>
    bool operator>(const mystring &R)const
    {
        if(strcmp(this->str,R.str)>0)
            return true;
         return false;
    
    //重载>=
    bool operator>(const mystring &R)const
    {
        if(strcmp(this->str,R.str)>=0)
            return true;
        return false;


    }

    //重载<=
    bool operator<=(const mystring &R)const
    {
        if(strcmp(this->str,R.str)<=0)
            return true;
        return false;


    }

    //重载==
    bool operator==(const mystring &R)const
    {
        if(strcmp(this->str,R.str)==0)
            return true;
        return false;


    }

    //将全局函数设置成友元函数
    friend ostream &operator<<(ostream &L, mystring &R);
    friend istream &operator>>(istream &L, mystring &R);


};

istream &operator>>(istream &L,mystring &R)
{
    char s[R.mysize()];
    cin>>s;
    strcpy(R.c_str(),s);

    return L;

}

ostream &operator<<(ostream &L,mystring &R)
{
    char s[R.mysize()];
    cout<s4" << endl;
    cout << "s3> s6;
    cout << "s6=" << s6.c_str() << endl;

    return 0;


}