Thread: weird compilation error

hi all...
i have a weird compilation error... when i declared an object

|error: no matching function for call to `Stack::Stack()'| !!!!!!

this is the code!!

Code:

#include <iostream>
#include <fstream>

using namespace std;

class Stack {

    private:

    char *stackArr;
    int Size;
    int top;


    public:

    Stack (int s)
    {
        stackArr= new char[s];
        Size= s;
        top= -1;
    }

    ~Stack ()
    {
        delete[] stackArr;
    }

    bool Push (char c)
    {
        if(top == Size-1)   // stack is full
        return false;

        else
        {
            top++;
            stackArr[top]= c;
            return true;
        }
    }

    bool Pop (char & c)
    {
        if(isEmpty())
        return false;

        else
        {
            c= stackArr[top];
            top--;
            return true;
        }
    }

    bool Peek (char & c)
    {
        if(top==-1)
        return false;
        c= stackArr[top];
        return true;
    }

    bool isEmpty ()
    {
        return top== false;
    }
};



int main()
{
    Stack S,St;
    ifstream inFile;
    ofstream outFile;
    char c;
    int counter=0;

    inFile.open("File1.txt");
    if(!inFile)
    {
        cout<<"UNABLE TO OPEN THIS FILE!!! "<<endl;
        exit(1); // terminated with error
    }
    else

    Stack(100);
    while(inFile!=NULL)
    {
        inFile.get(c);
        S.Push (c);
        counter++;
    }
    outFile.open("File2.txt");
    while(!outFile)
    {
        if(!S.isEmpty())
        {
            S.Pop(c);
            outFile<< S.Peek(c);
            cout<<endl;
        }
    }



        return 0;
}

and also i have a question...

i want to read from a text file then copy every character into a stack after that i have to save it in another text file in reverse order

who could teach me how can i save it in reverse order please ?!!

i'm new in stack and really i have problem with using it

It's probably complaining about this line since you have specified a constructor that takes an int but not one that doesn't take any arguments.

Code:

Stack S,St;

Also, what is this line supposed to do?

Code:

Stack(100);

Originally Posted by Memloop

It's probably complaining about this line since you have specified a constructor that takes an int but not one that doesn't take any arguments.

Code:

Stack S,St;

Also, what is this line supposed to do?

Code:

Stack(100);

100 is the size of the stack ! is it wrong ! :s

Originally Posted by Elysia

You cannot create a class and initialize it later. You must initialize it directly when you create it, so it should be:
Stack S(100)

If you do not know the size at the time you create it, you can delay creating it until after you know the size.
If that is not possible, then you have to make a pointer to the class and create it later when you need it with new and initialize it.

thank you,,,
yes you r right i have to initialize the size first