c++　类名和enum时重复时要在类名前加class::

c++　类名和enum时重复时要在类名前加class::

一些不好的习惯都是用小写，但又没有区分开token，看看代码再说，下面的代码是我在测试polymorphism时写的一部分，怎么也查不出，最后主意到下面红色标志出来的语句，他们（animal）重复了，要区分开来。

重复名的有很多情况，以后遇见再在一起总结，先记录下来。

#include <iostream>

#include <cstring>

#include <string>

using namespace std;

enum zoo_obj_kind{

null = 0,

#define zk_null (zoo_obj_kind(null))

no = 0,

#define zk_no (zoo_obj_kind(no))

animal = 1,

#define zk_animal (zoo_obj_kind(animal))

plant = 2,

#define zk_plant (zoo_obj_kind(plant))

others = 3,

#define zk_others (zoo_obj_kind(others))

max = 4

#define zk_max 4

};

static const char * zoo_kind_str [zk_max ] ={

"null",

"animal",

"plant",

"others"

};

class obj{

private:

char name [40];

// void *other_msg;

public:

obj() {

strcpy(name,"null") ;

}

obj(char *nm){

strncpy(name,!nm?"null":nm,sizeof(name));

}

void say(){

cout << "name:" << name << endl;

}

void say(obj *obj){

!obj

? cout << "null\n"

: cout << "name:" << obj->name << endl;

}

};

class zoo_obj{

private:

zoo_obj_kind z_kind;

char name [40];

void *other_msg;

public:

zoo_obj() {

z_kind = null;

strcpy(name,"null") ;

}

zoo_obj(char *nm, zoo_obj_kind k){

strncpy(name,!nm?"null":nm,sizeof(name));

z_kind = k;

}

void say(){

cout << "name:" << name << ",kind:"

<< zoo_kind_str[(int) z_kind] << endl;

}

void say(zoo_obj *obj){

!obj

? cout << "null\n"

: cout << "name:" << obj->name << endl;

}

};

class animal:public obj{

private:

int lags;

public:

animal(char *nm, int l) :lags(l), obj(nm){ }

void say(){

obj::say();

cout << "lag:" << lags << endl;

}

};

int main(void){

zoo_obj obj = zoo_obj( "cat", zoo_obj_kind(animal));

obj.say();

class::animal dog ("joel's dog",4);

dog.say();

}