Error Function Template Has Already Been Defined
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Error Attribute Titletextstyle Has Already Been Defined
a map using Binary search tree #ifndef _map_h #define _map_h #include using namespace std; template class Map { public: Map(); ~Map(); ValType getvalue(string key); void add(string key,ValType value); private: struct node{ string key; ValType value; node *right; node *left; }; node *root; node *treeSearch(string key,node *t); void treeEnter(string key,ValType value,node *&t); }; #include"map.cpp" #endif map.cpp #include #include #include"map.h" using namespace std; template Map::Map(){ root=NULL; } template Map::~Map(){ delete root; } template ValType Map::getvalue(string key){ node *found=treeSearch(key,root); if(found==NULL) cout<<"Couldnot Found the node"; else return found->value; } template typename Map::node *Map::treeSearch(string key,node *t){ if(t==NULL) return NULL; if(t->key==key) return t; if(t->key>key) treeSearch(key,t->left); else treeSearch(key,t->right); } template void Map::add(string key,ValType value){ treeEnter(key,value,root); } template void Map::treeEnter(string key,ValType value,node *&t){ if(t==NULL){ t->value=value; t->key=key; t->left=NULL; t->right=NULL; } else if(t->key==key) t->value=value; else if(t->key>key) treeEnter(key,value,t->left); else treeEnter(key,value,t->right); } Error:For all the functions its saying that they are already been defined. I
a program that tests the functionality of template classes for my c++ class but i keep getting this error at the overloaded << and
Function Template Has Already Been Defined Visual Studio
>> functions when i try to test the class using a double class template has already been defined c++ can someone help me out MyData.h #include using namespace std; #include template class MyData { error c2953: class template has already been defined T value; public: //Constructors MyData(T t) { value = t; } MyData() { value = 0; } //SetData void setData(T t) { value = t } //GetData T getData() http://stackoverflow.com/questions/17512915/error-c2995function-template-has-already-been-defined { return value; } //Overload + MyData operator+(MyData op2) { return value+op2.value; } //Overload - MyData operator-(MyData op2) { return value-op2.value; } //Overload = MyData operator=(MyData op2) { return value = op2.value; } //Overload > bool operator>(MyData op2) { if (value>op2.value) return true; else return false; } //Overload ++ MyData operator++(int) { return value++; } //Overload cin templatehttps://www.daniweb.com/programming/software-development/threads/397665/error-function-template-has-already-been-defined T> friend istream &operator>>(istream &stream, MyData &obj) { cout << "Enter data: "; stream >> obj.value; return stream; } //Overload cout template friend ostream &operator<<(ostream &stream, MyData &obj) { stream << obj.value; return stream; } }; //Create string specialization template <> class MyData { string value; public: MyData(string t) { value = t; } MyData() { value = ""; } friend istream &operator>>(istream &stream, MyData &obj) { cout << "Enter data: "; stream >> obj.value; return stream; } friend ostream &operator<<(ostream &stream, MyData &obj) { stream << obj.value; return stream; } }; Main #include using namespace std; #include "MyData.h" int main() { int intValue = 12; MyData intData(intValue); intData++; cout <<"integer incremented: " << intData< secondInt(3); cout<<"Sum of two integers: "<< intData+secondInt< EqualsData; cout<<"Test default constructor: "<< EqualsData< secondInt) cout< doubleData1(12.2); MyData doubleData2(4.2); cout< stringData("Good"); cout<<"Test string data: "<resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups https://msdn.microsoft.com/en-us/library/ydwzahe8.aspx TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs http://cboard.cprogramming.com/cplusplus-programming/114758-function-template-has-already-been-defined.html and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. C/C++ Building Reference C/C++ Build Errors Compiler Errors C2900 Through C3499 Compiler Errors C2900 Through C3499 Compiler Error has already C2995 Compiler Error C2995 Compiler Error C2995 Compiler Error C2902 Compiler Error C2903 Compiler Error C2904 Compiler Error C2906 Compiler Error C2908 Compiler Error C2909 Compiler Error C2910 Compiler Error C2911 Compiler Error C2912 Compiler Error C2913 Compiler Error C2914 Compiler Error C2917 Compiler Error C2918 Compiler Error C2919 Compiler has already been Error C2920 Compiler Error C2921 Compiler Error C2923 Compiler Error C2927 Compiler Error C2928 Compiler Error C2929 Compiler Error C2930 Compiler Error C2931 Compiler Error C2932 Compiler Error C2933 Compiler Error C2934 Compiler Error C2935 Compiler Error C2936 Compiler Error C2937 Compiler Error C2939 Compiler Error C2940 Compiler Error C2941 Compiler Error C2942 Compiler Error C2943 Compiler Error C2944 Compiler Error C2945 Compiler Error C2946 Compiler Error C2947 Compiler Error C2948 Compiler Error C2951 Compiler Error C2952 Compiler Error C2953 Compiler Error C2955 Compiler Error C2957 Compiler Error C2958 Compiler Error C2959 Compiler Error C2962 Compiler Error C2969 Compiler Error C2970 Compiler Error C2971 Compiler Error C2973 Compiler Error C2974 Compiler Error C2975 Compiler Error C2976 Compiler Error C2977 Compiler Error C2978 Compiler Error C2979 Compiler Error C2988 Compiler Error C2989 Compiler Error C2990 Compiler Error C2991 Compiler Error C2992 Compiler Error C2993 Compiler Error C2994 Compiler Error C2995 Compiler
Programming Boards C++ Programming Function template has already been defined Getting started with C or C++ | C Tutorial | C++ Tutorial | C and C++ FAQ | Get a compiler | Fixes for common problems Thread: Function template has already been defined Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 04-13-2009 #1 Elysia View Profile View Forum Posts C++まいる！Cをこわせ！ Join Date Oct 2007 Posts 24,467 Function template has already been defined Can anyone say why I get this error message that indicates that it has been defined twice? The functions in question are two operators defined inline in the class: Code: template class thread_safety = ptr_thread_dangerous, int Bits = 32> class mad_shared_ptr { //... template friend bool operator == (const mad_shared_ptr& lhs, const mad_shared_ptr& rhs) { return (lhs.m_ptr == rhs.m_ptr); } template friend bool operator != (const mad_shared_ptr& lhs, const mad_shared_ptr& rhs) { return !(lhs == rhs); } //... } When the header containing the template class is included in two source files, it gives me these re-definition errors. 1>------ Build started, Configuration: Debug Win32 ------ 1>Compiling... 1>Testing.cpp 1>Compiling... 1>CCharacter.cpp 1>mad_shared_ptr.h(130) : error C2995: 'bool operator ==(const mad_shared_ptr &,const mad_shared_ptr &)' : function template has already been defined 1>mad_shared_ptr.h(130) : see declaration of 'operator ==' 1>ccharacter.cpp(39) : see reference to class template instantiation 'mad_shared_ptr' being compiled 1> with 1> [ 1> T=hgeSprite 1> ] 1>mad_shared_ptr.h(136) : error C2995: 'bool operator !=(const mad_shared_ptr &,const mad_shared_ptr &)' : function template has already been defined 1>mad_shared_ptr.h(136) : see declaration of 'operator !=' ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== Both Testing.cpp and CCharacter.cpp includes the header, and the header DOES have inclusion guards. I can post the entire class if necessary. Originally Posted by Adak io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions. Originally Posted by Salem You mean it's included as a crutch to help ancient programmers