[RESOLVED] C++ program runs but i get garbage as an output

Im using visual c++ 6.0

Code:

---

#include <iostream.h>
#include <conio.h>
#include <string.h>

class customer
{
private:
        char cardname[20];
        float creditlimit;
        float amountspent;
        float amountleft;
        calculate();
       
       
       
public:
        void input();
        void output();
       
};

void customer::input()
{
        cout<<"Please enter the card name: ";
        cin>>cardname;
        cout<<"Please enter the credit limit: ";
        cin>>creditlimit;
        cout<<"Please enter the amount spent: ";
        cin>>amountspent;
}

customer::calculate()
{
       
        amountleft = creditlimit - amountspent;
       
}

void customer::output()
{

        cout<<"Thank you "<<cardname<<" you have "<<amountleft<<" left.";
}

void main()
{
        customer c1;
        c1.input();
        c1.output();
        getch();
}

---

for example if i put the credit limit at 500 and the amount spent at 200 i get asdfasdf123123!@+800 for an answer

any ideas?

Code:

---

void customer::input()
{
        cout<<"Please enter the card name: ";
        cin>>cardname;
        cout<<"Please enter the credit limit: ";
        cin>>creditlimit;
        cout<<"Please enter the amount spent: ";
        cin>>amountspent;
        calculate();
}

---

Heh, I noticed that too. Its just displaying the contents of the unset variable, it doesn't actually calculate amountleft.