Hi there, I have this class header

//header for class.
#ifndef Container_H
#define Container_H

#include <iostream>
using namespace std;


const int DEFAULT=32;

class Container{
    public:
        Container(int maxCapacity = DEFAULT);
        ~Container();
        void insert(int item, int index);
        void erase(int index);
        int size()const;
    private:
        int sizeC;                
        int capacityC;           
        int * elements;            
};
void info();
#endif

and this source file

#include "container.h"


Container::Container(int maxCapacity = DEFAULT){
    int y;
}
void Container::insert(int item, int index){
    int x;
}

and when i compile this i get the following error message

test.cpp:4: error: default argument given for parameter 1 of `Container::Container(int)'
container.h:12: error: after previous specification in `Container::Container(int)

what have i done wrong here?