undefined reference to function

[ams149]

Write your question here.
problem is this code showing undefined reference to decof xora(int,int)
error is showing on this line m= ob.xora(q[j-1],i[j-1]);

 cpp
#include <iostream>
#include "decof.h"

using namespace std;

int main()
{
    cout << "Hello world!" << endl;
    int n,j;
    cout<<"How many digits?"<<endl;
    cin>>n;
    int i[n],p,q[n+1],m;
    decof ob;

    for(int j=0;j<n;++j)
        {   cin>>p;
            i[j]=p;

        }
         for(int j=0;j<n;++j)
        {   cout<<i[j];

        }

for(int j=0;j<(n+1);++j)
        {
            if (j==0)
            {
                cin>>q[j];
            }
            else
            {
              m= ob.xora(q[j-1],i[j-1]);

            }
        }

    return 0;
}
header fle:
#ifndef DECOF_H
#define DECOF_H


class decof
{
    public:
        decof();
        virtual ~decof();
        int xora(int q,int i);

    protected:

    private:
};

#endif // DECOF_H
decof function:
#include <iostream>
#include "decof.h"

using namespace std;

decof::decof()
{
    //ctor
}

decof::~decof()
{
    //dtor
}
int xora(int q,int i)
{
    return((q||i)&&!(q&&i));

}
er

[jlb]

You need to properly qualify that xora() is part of the class and that it is not just a function in the global scope.

int decof::xora(int q, int i)

But really there is not much point of our class since it doesn't have any class member variables.

I also suggest you start using more meaningful variable and function names to make your code easier to understand.

[ams149]

Thanks, It works