Unresolved whatchmucallits

ok here is the code

Code:

#include <iostream.h>
#include <iomanip.h>

class Savings
{
private:
	float balance;
	float rate;
	float interest;
	
public:
	Savings(float=0,float=0,  float=0); //constructor function with defaults
    intearned(float,float, float); //member function to copy car info
	void showearn(void);
};

//implementation section
Savings::intearned(float bal, float rte, float intrst)
{
	
	balance=bal;
	rate=rte;
	interest=intrst;

}


void Savings::showearn(void)
{
cout<<"The earnings are";

cout<< setfill('0')
    <<setw(2) << "the rate of" <<  rate
	<<setw(2) << "has earned" << interest
	<<setw(2) << "the balance is now"<< balance ; 
cout<<endl;
return;
}
int main()
{
	Savings a, c(6, 500, 1200);
	

	

	cout<<endl;
	
	a.showearn();
	
	c.showearn();
   
	cout<<endl;

	return 0;
}

and here is the error I keep recieving
and I quote"unresolved external symbol "public: __thiscall Savings::Savings(float,float,float)" (??0Savings@@QAE@MMM@Z)

please helllllllp meeeeee!!!!

Can you use a function before you define it? o.o

Unless it is a pre-defined C++ function, no you cannot.

You also can't use a function if you don't define it at all.

You need to define the Savings constructor. What you'll probably want to do is just have it call intearned with the passed in values.