linux - c++中类函数定义与声明问题-PHP中文網路問答

对运算符*和/重载，当把这两种重载函数都在.h文件中定义时，不报错，当把他们在.cpp文件实现时，提示：“vector.cpp:44:37: error: no ‘Vector3 Vector3::operator/(float)’ member function declared in class ‘Vector3’
Vector3 Vector3::operator/(float num)”。

vector.h

/*实现Vector3（三维向量）相关运算的类*/ #ifndef VECTOR_3 #define VECTOR_3 #include  #include  using namespace std; class Vector3 { public: /*缺省的构造函数*/ Vector3() { x = 0; y = 0; z = 0; } Vector3(float x, float y, float z); ~Vector3(){cout<<"执行析构函数" <


      vector.cpp
      #include "vector.h" //注意这里，不要yong<>.否则就是去系统中找了 Vector3::Vector3(float x,float y,float z) { this->x = x; this->y = y; this->z = z; } void Vector3::set(float _x,float _y,float _z) { x = _x; y = _y; z = _z; } Vector3 Vector3::operator+(const Vector3 &v) { return Vector3(x+v.x,y+v.y,z+v.z); } Vector3 Vector3::operator-(const Vector3 &v) { return Vector3(x-v.x,y-v.y,z-v.z); } int main(int argc,char **argv) { Vector3 v1(1,2,3); Vector3 v2(2,3,4); Vector3 v3 = v1+v2; cout<<"v1 + v2 = "<

      运行上述程序不会报错。但是若将vector.h中的
      Vector3 Vector3::operator*(float num) { return Vector3(x*num,y*num,z*num); } Vector3 Vector3::operator/(float num) { return Vector3(x/num,y/num,z/num); }
      实现部分放到vector.cpp文件中，则会报错！
求解释？
自己所用系统为Gentoo Linux 编译器g++。
      当把上述代码移植到window+vs2013时，则没有上述错误，请问为什么？？

/*实现Vector3（三维向量）相关运算的类*/ #ifndef VECTOR_3 #define VECTOR_3 #include #include using namespace std; class Vector3 { public: /*缺省的构造函数*/ Vector3() { x = 0; y = 0; z = 0; } Vector3(float x, float y, float z); ~Vector3(){cout<<"执行析构函数" <

#include "Vector.h" Vector3::Vector3(float x,float y,float z) { this->x = x; this->y = y; this->z = z; } void Vector3::set(float _x,float _y,float _z) { x = _x; y = _y; z = _z; } Vector3 Vector3::operator+(const Vector3 &v) { return Vector3(x+v.x,y+v.y,z+v.z); } Vector3 Vector3::operator-(const Vector3 &v) { return Vector3(x-v.x,y-v.y,z-v.z); } Vector3 Vector3::operator*(float num) { return Vector3(x*num,y*num,z*num); } Vector3 Vector3::operator/(float num) { return Vector3(x/num,y/num,z/num); } int main(int argc,char **argv) { Vector3 v1(1,2,3); Vector3 v2(2,3,4); Vector3 v3 = v1+v2; cout<<"v1 + v2 = "<