C ++：数字常量前的期望标识符 [英] C++: expected identifier before numeric constant

问题描述

我试图使用MTL编写一个小程序，但是当我尝试使一个MTL Matrix成为一个类的成员时，我收到了提到的错误。

  #include< boost / numeric / mtl / mtl.hpp> 
 
 class myClass 
 {
 private：
 mtl :: dense2D< double> Ke（6,6）; 
};但是，main（）中的同一语句没有问题：
 $ b 
 
 $ b 
  #include< boost / numeric / mtl / mtl.hpp> 
 
 int main（int argc，char ** argv）
 {
 mtl :: dense2D< double> Ke（6,6）; 
 return 0; 
} 
  
我是C ++的新手，我不认为这是
解决方案
你需要在构造函数的初始化列表中这样做。
  class myClass {
 mtl :: dense2D< double> Ke; 
 public：
 myClass（）：Ke（mtl :: dense2D< double>（6，6））{} 
}; 
  
 
I'm trying to write a small program using MTL, but I'm getting the mentioned error when I try to make a MTL Matrix a member of a class.
#include <boost/numeric/mtl/mtl.hpp>

class myClass
{
private:
    mtl::dense2D<double> Ke(6,6);
};
However, there is no problem with the same statement in main():
#include <boost/numeric/mtl/mtl.hpp>

int main(int argc, char** argv)
{
    mtl::dense2D<double> Ke(6,6);
    return 0;    
}
I'm very new to C++, and I don't think this is really related to the MTL, but that's where the error occurred for me.
解决方案
You need to do that in the constructor's initialiser list.
class myClass {
    mtl::dense2D<double> Ke;
public:
    myClass() : Ke(mtl::dense2D<double>(6, 6)) { }
};


                        
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