Linker Error in Program

[sylar]

The main file of my program mainfile.cpp.

#include "classfile.h" 
#include "test1.h"
int main()
{
    test t0;// test class define in header file "classfile.h"
    t0.getstring();
    t0.printstring();
    
    test1 t1(10,20);// test1 class defined in header file "test1.h"
    cout<<"The sum in 1st case is "<<t1.sum()<<endl;// using the parameterised constructor
    
    int a,b;
    test1 t2(5,5);//using the default constructor
    cout<<"Sum using default parameters is "<<t2.sum()<<endl;
    cout<<"Enter the numbers a and b ";
    cin>>a>>b;
    t2.getdata(a,b);// using function getdata() to input data
    t2.sum();
    cout<<"The sum in 2nd case is "<<t2.sum();
        
    cin.clear();
    cin.ignore(255,'\n');
    cin.get();
    return 0;
}

The test1.h header file interface file.

//class interface file. definiton in the test1

#ifndef class_h
#define class_h

class test1
{
      public:
             test1(int,int);
             void getdata(int,int);
             int sum();
      private:
              int a;
              int b;
};

#endif 

Definition of functions for the header file test1.h (test1.cpp)

//definiton for the header file test1.h
#include "test1.h"

test1::test1(int x=0,int y=0)
{
     a=x;
     b=y;
}

void test1::getdata(int x,int y)
{
     a=x;
     b=y;
}

int test1::sum()
{
    return a+b;
}

This is the definition of the header file classfile.h

//this header file has interface and definiton in the same file

#include<iostream>
using std::cout;
using std::cin;
using std::endl;

#include<string>
using std::string;

class test
{
      string str;
      public:
             void getstring()
             {
                  cout<<"Enter string ";
                  getline(cin,str);
             }
             void printstring() const
             {
                  cout<<"\nThe string is "<<str;
             }
};

I have put all the four files(mainfile.cpp,test1.h,test1.cpp and classfile.h) in the same directory and using bloodshed dev c++ ide. Im getting linker error for the class test1.h . The other class has no such problem and the code runs file when i don't use test1.h . What is the error im making?

[kbw]

You haven't said what the error is. You need to post it verbatum.

In test.cpp you have:
test1::test1(int x=0,int y=0)
is should be:
test1::test1(int x,int y)

And you should change this in test.h
test1(int,int);
to
test1(int x=0, int y=0);