静态成员函数

C++字符串类设计与实现

原创于 2019-07-29 22:49:56 发布 · 256 阅读

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#c++

#include<iostream>
#include<stdlib.h>
#include<cstring>
using namespace std;
    class Cstring
        {
        public:
            Cstring(char *);
            static int get_total(Cstring &);//静态成员函数可以在外面定义，要引用非静态成员，只能通过传参的方式
            void show();
            Cstring(Cstring &);
        private:
            char *strings;
            static int total_len;
            int len;
        };

        Cstring::Cstring(Cstring &t)
            {
                int length=strlen(t.strings)+1;
                strings=new char[length];
                if(strings==0)
                {
                    cout<<"申请内存失败"<<endl;
                    exit(1);
                }

                strcpy(strings,t.strings);
                len=t.len;
            }
        Cstring::Cstring(char *p)
            {
                int length=strlen(p)+1;
                strings =new char[length];
                if(strings==0)
                {
                    cout<<"申请内存失败"<<endl;
                    exit(1);
                }
                strcpy(strings,p);
            }

        int Cstring::total_len=0;

        int Cstring::get_total(Cstring &str)
            {
                total_len+=strlen(str.strings);
                cout<<str.strings<<endl;
                return total_len;
            }
        int main()
            {
                Cstring string1("dwz");
                Cstring string2("dxfaa");
                cout<<Cstring::get_total(string2)<<endl;
                cout<<Cstring::get_total(string1)<<endl;
                return 0;
            }