c++ - error : multiple definition of constructor -

can please me know how can avoid error.. in advance.

file name: point.hh

#ifndef point_h #define point_h class point{     private:         int x;         int y;     public:         point(); }; #endif 

file name:point.cc

#include "point.hh" #include <iostream> using namespace std; point::point() {     x=0;     y=0;     cout<<"x="<<x;     cout<<"y="<<y; } 

file name: main.cc

#include"point.cc" int main() {     point p;              // calls our default constructor } 

you must include header file, not source file, in main.cc file use point class.

that is, replace:

#include"point.cc" 

by:

#include"point.hh" 

the rationale behind function definition, unless marked inline, must respect odr ("one definition rule"). including source file in other source file, end having 2 (identical) definitions of point::point() function in 2 different translation units.

when linking process takes place, sees 2 definitions , complains: error get.