list - Error in C++ : redefinition of class constructor using templates -

anybody know how can fix these errors? have been looking @ while , cannot figure out do.

error:

indexlist.cpp:18: error: redefinition of `indexlist<t>::indexlist()' indexlist.cpp:18: error: `indexlist<t>::indexlist()' declared here indexlist.cpp:30: error: redefinition of `bool indexlist<t>::append(t)' indexlist.cpp:30: error: `bool indexlist<t>::append(t)' declared here 

cpp file:

// // // // // // #include "indexlist.h" #include <iostream> using namespace std;  //constuctor //descriptions: initializes numberofelement 0 //              initializes maxsize 100 //parameters:   none //return:       none template <class t> indexlist<t>::indexlist() {   numberofelements = 0;   maxsize = 100; }   //name: append //purpose: adds element end of list. if array full, returns false //paramters: value - thing append //return: true if append succeeds, false otherwise template <class t> bool indexlist<t>::append(t value) {   if (maxsize > numberofelements)     {       list[numberofelements] = value;       numberofelements ++;       return true;     }   else     return false; } 

i didn't put the cpp file because rest of errors similar ones above, , quite long

header:

#include <iostream> using namespace std;   #ifndef indexlist_h #define indexlist_h  template <class t> class indexlist {  public:  indexlist();   bool append(t value);   bool insert(int indx, t value);   bool replace(int indx, t newvalue);   bool retrieve(int indx, t &value) const;   bool remove(int indx);   void sort();   int search(t value) const;  private:  t list[100];  int numberofelements;  int maxsize; };   template <class t> ostream &operator<<(ostream &outstream, const indexlist<t> &lst);  #include "indexlist.cpp"  #endif 

i did put entire header

each of 2 files tries include other, can cause preprocessor output repeated code.

take #include "indexlist.h" out of file indexlist.cpp.

also, build process should not attempt compile indexlist.cpp object file.

another way arrange things put contents have in indexlist.cpp near end of indexlist.h, , there no indexlist.cpp file @ all.