undefined reference to function in main()

Question

i tried to make a program on seperate files. Unfortunatelty i had erros while trying to build the code. It was pointing on undefined references to constuctors,destructos and function CzynnikiPierwsze. So i decied to put the whole code in one code. Still there is a problem in main() function: undefined reference to 'CzynnikiPierwsze(int)' Any ideas whats wrong? Here is the whole code:

#include <iostream>
#include <cctype>
#include <vector>


using namespace std;
vector<int> CzynnikiPierwsze(int);


class NieprawidlowaDana                           //wyjatki
    {};
class SpozaZakresu
    {};



class RozkladLiczby{
    private:
        int *tab;
    public:
        RozkladLiczby(int);                  //konstruktor
        vector<int> CzynnikiPierwsze(int); //metoda
        ~RozkladLiczby();
};

/////////////////BODY of the CLASS/////////////////////////////////////

RozkladLiczby::~RozkladLiczby()         //destruktor
{}

RozkladLiczby::RozkladLiczby(int n){
    int* tab = new int[n+1];
    int i,j;

    for( i=0;i<=n;i++)
        tab[i]=0;                  //zerujemy tablice

    for( i=2;i<=n;i+=2)
        tab[i]=2;                  //zajmujemy sie liczbami parzystymi

    for(i=3; i<=n;i+=2)
        for(j=i;j<=n;j+=i)         //sito erastotesa
            if(tab[j]==0)
                tab[j]=i;


}

   vector<int> RozkladLiczby::CzynnikiPierwsze(int m){
        vector<int> tablica;
        while(m!=1){
            tablica.push_back(tab[m]);
            m=m/tab[m];
        }

return tablica;

}


////////////////////////END OF THE BODY//////////////////////////////




int parsuj(char* argz){
    int i=0;
        while(argz[i] != '\0'){                  //funckja ktora konwertuje na int i sprawdza czy wprowadzaony zostal string
            if( !isdigit(argz[i]))
                throw NieprawidlowaDana();
                i=i+1;
            }
        int x = stoi(argz);
        if (x >= 2)
            return x;
        else
            throw SpozaZakresu();

}






//////////////////GLOWNY BLOK///////////////////////////////////////

int main(int argc,char* argv[]){


    vector<int> tablica,p;
    int i,n;
    int max;

     for( i=1;i<=argc-1;i++){
        n = parsuj(argv[i]);
        tablica.push_back(n);
    }

     max=tablica[0];

     for(i=1; i<=argc-1;i++){
        if(tablica[i]>max)
            max=tablica[i]; }  // sprawdzamy max 

    RozkladLiczby odp = RozkladLiczby(max);  //utwoorzylismy obiekt z maxa


     for(unsigned int i=0;i<=tablica.size()-1;i++){
        p=CzynnikiPierwsze(tablica[i]);
        cout<<tablica[i]<<" = ";
        int x= p[0];

        int licznik = 1;
        for(unsigned int j=1;j<=p.size()-1;j++){
            if(x==p[j])
                licznik++;
            else if(licznik!=1)
                cout<<x<<"^"<<licznik<<"*";
            else
                cout<<x<<"*";
        } 
            cout<<endl;

        }

return 0;

}

I would be grateful if u could solve this.

`p=CzynnikiPierwsze(tablica[i]);` is perhaps intended to be `p=odp.CzynnikiPierwsze(tablica[i]);`? — mah, Mar 22 '14 at 13:58
possible duplicate of [What is an undefined reference/unresolved external symbol error and how do I fix it?](http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix) — Luchian Grigore, Apr 09 '14 at 11:04

score 7 · Accepted Answer · answered Mar 22 '14 at 13:58

7

You have declared global function vector<int> CzynnikiPierwsze(int); but you have not defined it anywhere in your program. In your main you are calling global function and not the one which is your class member.

answered Mar 22 '14 at 13:58

Abhishek Bansal

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He's defined it as a class function. – mah Mar 22 '14 at 13:59
i am dumb. THats true. I should use odp.CzynnikiPierwsze() to get to this function. Ty – user3402584 Mar 22 '14 at 14:00
That is class member not the global function. – Abhishek Bansal Mar 22 '14 at 14:00

undefined reference to function in main()

1 Answers1