一个数组外包装，错在哪里？

[xlsue]

//数组外包装
#include <iostream>
#include <algorithm>
#include <cstddef>
using namespace std;

template <typename T, size_t thesize>
class carray {
private:
T v[thesize];
public:
typedef T value_type;
typedef T* iterator;
typedef const T* const_iterator;
typedef T& reference;
typedef const T& const_reference;
typedef size_t size_type;
typedef ptrdiff_t difference_type;

iterator begin() { return v;}
const_iterator begin() { return v;}
iterator end() { return v+thesize; }
const_iterator end() { return v+thesize;}

reference operator[](size_t i) { return v[i]; }
const_reference operator[](size_t i) const { return v[i]; }

size_type size() const { return thesize; }
size_type max_size() const { return thesize; }

T* as_array() { return v; }
};

int main()
{
carray<int, 10> a;

for(size_t i=0; i<a.size(); ++i)
a[i] = i+1;

for(size_t i=0; i<a.size(); ++i)
cout << a[i] << " ";
cout << endl;

reverse(a.begin(), a.end());
for(size_t i=0; i<a.size(); ++i)
cout << a[i] << " ";
cout << endl;

getchar();
return 0;
}

[foochow]

晕...这样当然不行....

[oyd]

基本正确，但是要做一点点修改。

iterator begin() { return v;}
const_iterator begin()const { return v;}//加上const
iterator end() { return v+thesize; }
const_iterator end()const { return v+thesize;}//加上const

另外，如果在VC下编译，请定义一个宏
#define for if(0);else for

以避免VC中for的局部变量的BUG

[zhouhuahai]

问题出在:
iterator begin() { return v;}
const_iterator begin(){ return v;}
iterator end() { return v+thesize; }
const_iterator end(){ return v+thesize;}
函数重载发生错误:
不能以返回值是否为const来对函数重载.
解决方案:
1.为const的begin()和end()提供一个哑元参数.
如: const_iterator begin(int){ return v;}
2.改成const成员函数: 如
const_iterator begin() const { return v;}

[sankt]

up

[xlsue]

晕！竟然没有注意到！老是看它报错的地方。我用的是Dev-c++5.0。头河自尽去.....