这个C++模板代码出错的原因是什么？

Question

此代码导致编译时错误:

#include <iostream>
#include <vector>
#include <cmath>

template <unsigned short n>
class Vector {
    public:
        std::vector<float> coords;

        Vector();
        Vector(std::vector<float> crds);


        float distanceFrom(Vector<n> v);

        template <unsigned short m>
        friend std::ostream& operator <<(std::ostream& out, const Vector<m>& v);
};



    template <unsigned short n>
Vector<n>(vector<float> crds) {  // HERE IS ERRRO

}

编译错误:

C:\CodeBlocks\kool\praks3\vector.h|29|error: expected ')' before '<' token|
||=== Build finished: 1 errors, 0 warnings ===|

Answer 1

以下是如何在类外定义构造函数:

template <unsigned short n>
Vector<n>::Vector(std::vector<float> crds) {
//also notice this ^^^^                 
}