求解，C++ unresolved externals怎么解决？
各位大侠，我在编译的时候遇见了这种问题，请问如何解决
1>livertest2.obj : error LNK2001: unresolved external symbol "double * (* cyouten)[3]" (?cyouten@@3PAY02PANA)
1>livertest2.obj : error LNK2001: unresolved external symbol "double * * housen" (?housen@@3PAPANA)
1>C:\Users\allen\Documents\Visual Studio 2010\Projects\livertest2\Debug\livertest2.exe : fatal error LNK1120: 2 unresolved externals
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double *housen[];
double *cyouten[][3];
int point;
void getpoint(void){
STLDATA stl("C:/Users/allen/Documents/Visual Studio 2010/Projects/livertest2/out4.stl");
TRIANGLE tri;
int j;
for( j=0; j<stl.getDatanum(); j++){
//cout<<j<<endl;
stl.getData(j, &tri);
housen[j] = (double *)(tri.normal);
for(int i=0; i<3; i++)
cyouten[j][i] = (double *)(tri.vertex[i]);
}
point = j;
}
error?LNK2001 unresolved?externals c++ visual?studio?2010
[解决办法]
double *housen[];
double *cyouten[][3];
没有定义长度，又没有初始化（不写长度但初始化会自动计算长度）
