c++ - undefined reference to CLASS::function() -

-

so when try compile code using "g++ asg5.cpp" receive following error

/tmp/cczhpsgo.o: in function 'main':

asg5.cpp:(.text+0x2fb): undefined reference 'binomialtree::insert(int)'

collect2: ld returned 1 exit status

if anyone's wondering why i'm not using makefile, professor wants type g++ <.cpp main()> compile..

anyway here's code appreciate assistance!

asg5.cpp

#include "binomialtree.h" #include "binomialnode.h" #include <iostream> #include <vector> #include <fstream> #include <sstream> #include <stdlib.h> #include <string> #include <stdio.h>  using namespace std; int main(int argc, char* argv[]) {     //input handling     if(argc != 2)     {         cout << "incorrect usage. \n example: ./a.out <filename>" << endl;         exit(1);     }     binomialtree *tree = new binomialtree();       char *buffer;     char *token;     //read file buffer.**************************************     string input;     ifstream file;     file.open(argv[1]);     if(file.is_open())     {         string str;         while(file.good())         {             getline(file,str);             input += " " + str;         }     }     else{         cout << "file not found"<< endl;         return 1;     }     file.close();      int buf;     stringstream ss(input);      vector<int> tokens;      while(ss >> buf)     {         tokens.push_back(buf);     }     int = 0;     for(i = 0; < tokens.size(); i++)         tree->insert(tokens[i]);     //end file reading *******************************************     delete tree; }

binomialnode.h

#ifndef _binomialnode_h_ #define _binomialnode_h_ #include "binomialtree.h" class binomialnode {     public:          int k;         binomialnode *children[20];         int data;          binomialnode(); }; #endif

binomialnode.cpp

class binomialnode {        binomialnode::binomialnode(int n)     {            this->k = 0;         this->data = n;     } }

binomialtree.h

#ifndef _multimap_h_ #define _multimap_h_ #include "binomialnode.h"  class binomialtree {     public:         binomialnode * bq[20];           void insert(int n);         void merge(binomialnode *queue, binomialnode *in, int k);         void print(binomialnode *root, int tab); }; #endif

binomialtree.cpp

#include "binomialnode.h" #include "binomialtree.h" #include <iostream> #include <cstdlib>   class binomialtree {     void binomialtree::insert(int n)     {         binomialnode *in = new binomialnode(n);         if(bq[0] == null)         {             bq[0] = in;             return;         }         else             merge(bq[0], in, 0);     }     void binomialtree::merge(binomialnode *queue, binomialnode *in, int k)     {         if(queue == null)         {             bq[k] = in;             return;         }         if(n == null)         {             bq[k] = queue;             return;         }         if(queue->data > in->data)         {                merge(in, queue);             return;         }         queue->k++;         binomialnode* temp[queue->k];         int i;         for(i = 0; < queue->k-1; i++)             temp[i] = queue->children[i];         temp[queue->k-1] = in;         for(i = 0; < queue->k; i++)             queue->children[i] = temp[i];         if(bq[queue->k] == null)         {             bq[queue->k] = queue;             return;         }         else             merge(queue, bq[queue->k]);     }     void binomialtree::print(binomialnode *root, int tab)     {         if(root == null)             return;         int i;         for(i = 0; < tab*5; i++) cout << " ";         cout << root->data << endl;         for(i = 0; < root->k; i++) print(root->children[i], tab+1);     } }

you cpp files shouldn't have class in them. should more like:

binomialnode.cpp

#include "binomialnode.h"  binomialnode::binomialnode(int n) :   k(0) {   data = n; }

and of course corollary longer binomialtree.cpp. also, should compile like:

g++ binomialtree.cpp binomialnode.cpp asg5.cpp -o asg5

also you're going run lot of other problems code. instance:

binomialnode * bq[20];

i don't see bq being initialized anywhere, means you're pretty guaranteed seg fault if run this. need initialize or allocate it. seeing lines like:

if(bq[0] == null)

makes me think wanted:

binomialnode bq[20];

though still need initialize nulls since aren't guaranteed full of nulls when run program. also, recursive , infinite , can't possibly work (in binomialnode.h):

binomialnode *children[20];

there more issues code, wasn't question, i'll stop now!


Comments

Post a Comment

Popular posts from this blog

ios - Memory not freeing up after popping viewcontroller using ARC -

-
hi project arc based, using uinavigationcontroller make transition between viewcontroller. using profiler analyse happening behind scene memory. noticed when push viewcontroller allocate memory components , when pop not freeing allocated memory. since using arc unable implement dealloc or release component. have analysed in detail , there no memory leak in project. i not using strong property push viewcontroller. here how pushing viewcontroller. viewcontroller *obj = [[viewcontroller alloc] init]; [self.navigationcontroller pushviewcontroller:obj animated:no]; any clue whats going on? should free memory have consumed. please advise your description indicates have retain cycle, leads objects not being deallocated. typical source of retain cycles properties assigned loading nib files (usually declared iboutlet ). two strategies break them , release objects: declare property weak : @property (nonatomic, weak) iboutlet uilabel *statuslabel; set property nil in...
Read more

Django REST Framework perform_create: You cannot call `.save()` after accessing `serializer.data` -

-
i have following viewset: class artistprofileviewset(viewsets.modelviewset): queryset = artistprofile.objects.all() serializer_class = artistprofileserializer def perform_create(self, serializer): if serializer.is_valid(): serializer.save() with following serializers: class simpleartisttrackserializer(serializers.hyperlinkedmodelserializer): class meta: model = artisttrack fields = (...my fields...) class artistprofileserializer(serializers.hyperlinkedmodelserializer): owners = userserializer(many=true, required=false) tracks = simpleartisttrackserializer(many=true, required=false) class meta: model = artistprofile fields = (...my fields...) i getting following error: assertionerror: cannot call `.save()` after accessing `serializer.data`.if need access data before committing database inspect 'serializer.validated_data' instead. i don't see editing serializer.data object. th...
Read more

Why does Go error when trying to marshal this JSON? -

-
i'm trying rather simple example of trying decode json file structs using golang. however, when attempting error that json: cannot unmarshal object go value of type []main.track which don't understand. here's code in question, , json can found here . package main import ( "encoding/json" "fmt" "net/http" "os" ) // tracks group of track types type tracks struct { tracks []track } // track represents singular track type track struct { name string url string artist artist } // artist represents single artist type artist struct { name string mbid string url string } func main() { url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=netherlands" response, err := http.get(url) if err != nil { fmt.printf("%s\n", err) os.exit(1) } de...
Read more