这个程序为什么不能运行? - 未名空间MITBBS历史存档

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这个程序为什么不能运行?

这个程序为什么不能运行?# Programming - 葵花宝典

w*p2008-12-02 08:12

1 楼

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a*r2008-12-02 08:12

2 楼

住家通勤皆可。简单家务和帮助照顾7个月大的小男孩，薪酬面议。请发邮件至yanping
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j*j2008-12-02 08:12

3 楼

class A
{
static int a;
public:
static ini(int b)
{
a=b;
}
};
int main()
{
A a1;
a1.ini(3);
}
报错:
const error LNK2001: unresolved external symbol "private: static int A::a" (
[email protected]@@0HA)
谢谢

p*e2008-12-02 08:12

4 楼

同样的帖子啊，干吗发2遍呢

l*d2008-12-02 08:12

5 楼

it seems you have to define a just below the class declaration:
int A::a;
then it should be ok.

【在 j*****j 的大作中提到】

: class A
: {
: static int a;
: public:
: static ini(int b)
: {
: a=b;
: }
: };
: int main()

l*g2008-12-02 08:12

6 楼

tax is how much? give the final price please

l*d2008-12-02 08:12

7 楼

The declaration of a static data member in the member list of a class is not
a definition. The definition of a static data member is equivalent to an
external variable definition. You must define the static member outside of
the class declaration in namespace scope.
For example:
class X
{
public:
static int i;
};
int X::i = 0; // definition outside class declaration