How to make a choise for the user to choose a file to open?

[Q8iEnG]

Hi guys :)

I'm working on a project ( a game )

this is the code

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

//####### Begin Class Node ###########
class Node
{
public:
	string data;
	Node* link;

	Node(string x)
	{
		data = x;
		link = NULL;
	}
};

//####### Begin Class LinkList ###########
class LinkList
{
private:
	Node* head,*end,*temp,*trav;
	int count;
	void PrintBack(Node* x)
	{
		if (!x)
		{
			PrintBack(x->link);
			cout<<x->data<<"  ";
		}
	}
	
public:

	LinkList()
	{
		head = end = NULL;
		temp = NULL;
		count = 0;
	}

	bool Insert(string x)
	{
		if (!(temp = new Node(x)))
			return false;

		count++;

		if (!head)
		{
			head = end = temp;
			return true;
		}

		end->link = temp;
		end = temp;
		temp = NULL;
		return true;

	}

	bool FindX(string x)
	{
    bool found;
	found = false; 

    trav = head;  
                    
    while(trav != NULL && !found)	
        if(trav->data == x)    
           found = true;
        else
           trav = trav->link;  
                                   
     
     return found;
	}

	bool Remove(string &x)
	{
		if (!head)
			return false;

		if (count == 1)
		{
			x = head->data;
			delete head;
			head = end = NULL;
			count--;
			return true;
		}

		x = head->data;
		temp = head;
		head = head->link;
		delete temp; temp = NULL;

		return true;
	}

	bool delX(string x)
	{
		string u;

		if (!head)
			return false;

		if ( head->data == x)
		{
			Remove(u);
			return true;
		}

		for ( temp = head, trav = head->link; trav ; temp = trav,trav = trav->link)
		{
			if (trav->data == x)
			{
				temp->link=trav->link;
			
				if(trav==end)
					end = temp;

				delete trav;
				trav = NULL;

				return true;
			}
		}
		return false;
	}

	void PrintLinkList()
	{
		if(!head)
			cout<<"\nLinkList is Empty ... "<<endl;
		else
		for ( trav = head ; trav ; trav = trav->link)
		{
			cout<<trav->data<<" ";	
		}
	}

	void PrintBackword()
	{
		temp = head;

		PrintBack(head);
	}


	~LinkList()
	{
		while(head != NULL)    
		{
			temp = head;        
		    head = head->link; 
		    delete temp;        
		}

		end = head = temp = NULL;	
		count = 0;
	
	}

	void printNode(string &x)
	{
		trav = head;
		x = trav->data;
		trav=trav->link;
	}

	int counter()
	{
		return count;
	}

};

//####### Begin Function Main ###########
int main()
{
	string A[5000];
	string x;
	string p;
	int choose;
	LinkList lib; // Creating Object from the class LinkList

	cout << "Choose Which file you want to try the game on?\n";
	cout << "1 - madlib1.txt\n";
	cout << "2 - madlip2.txt\n";
	cin >> choose;


	// Switch loop to choose more than one file to play *FOR THE BONUS* xD
	switch( choose )
	{
	case 1:
		// Constructor that opens the file
		ifstream fin("madlip1.txt");

		// If statement to check if the file can be opened or not.
		if( !fin )
		{
			cerr << "\nError, Can't open the File.!\n";
			exit(1);

		} // end if statement
	
	break; // to exit switch

	case 2:
		// Constructor that opens the file
		ifstream fin("madlip2.txt");

		// If statement to check if the file can be opened or not.
		if( !fin )
		{
			cerr << "\nError, Can't open the File.!\n";
			exit(1);

		} // end if statement

		break; // to exit switch loop

	} // end switch

	int i =0; // Initiate this variable for the use of the array.

	// While Loop to read the File, and save the content in the array
	while( fin>>x )
	{
		A[i] = x;
		i++;
	}

	// For Loop to insert the Keywords to the LinkList.
	for( int j = 0; j < i; j++ ) 
	{
		if (A[j] == "adjective")
			lib.Insert("Adjective");
		
		if (A[j] == "verb")
			lib.Insert("Verb");

		if (A[j] == "name")
			lib.Insert("Noun");

		if (A[j] == "adverb")
			lib.Insert("Adverb");
	}

	int y = lib.counter();

	while (y != 0)
	{
		cout<<"Enter an ";
		lib.printNode(x);
		cout<<x;
		cout<<" ";
		lib.Remove(x);
		cin>>p;
		lib.Insert(p);
		cout<<endl;
	
		y--; // Decrement y until we finish from all the Keywords, to reach 0.

	}

	// For loop to replace each Keyword with the suitable word from the user.
	for(int r = 0; r < i; r++) 
	{
		if (A[r] == "adjective")
		{
			lib.printNode(x);
			A[r] = x;
			lib.Remove(x);
		}
		
		if (A[r] == "verb")
		{
			lib.printNode(x);
			A[r] = x;
			lib.Remove(x);
		}

		if (A[r] == "name")
		{
			lib.printNode(x);
			A[r] = x;
			lib.Remove(x);
		}

		if (A[r] == "adverb")
		{
			lib.printNode(x);
			A[r] = x;
			lib.Remove(x);
		}
	}
	
	// For loop to output the new updated paragraph
	for(int k = 0; k < i ; k++)
	{
		if(A[k] =="!")
			cout<<"\n\n\n";
		
		cout<<A[k]<<" ";
	}
	

	return 0; // To indicate successfully termination

}
//####### End Function Main ###########

See the MAIN

I did tried Switch Loop but it doesn't work

Any good Plans? :/ it'll be appreciated :)

[Q8iEnG]

I tried also If statement, but with no success :'(!!

What should I do, any suggestions?

thanks :)

[William Hemsworth]

The variable fin is destructed before you use it. For this to work you would have to arrange it slightly differently.

switch( choose )
	{
	case 1:
		// Constructor that opens the file
		ifstream fin("madlip1.txt");

		// If statement to check if the file can be opened or not.
		if( !fin )
		{
			cerr << "\nError, Can't open the File.!\n";
			exit(1);

		} // end if statement
	
	break; // to exit switch

	case 2:
		// Constructor that opens the file
		ifstream fin("madlip2.txt");

		// If statement to check if the file can be opened or not.
		if( !fin )
		{
			cerr << "\nError, Can't open the File.!\n";
			exit(1);

		} // end if statement

		break; // to exit switch loop

	} // end switch

	int i =0; // Initiate this variable for the use of the array.

	// While Loop to read the File, and save the content in the array


	// Too late, its already been destructed
	while( fin>>x )
	{
		A[i] = x;
		i++;
	}

for this to work, construct the variablefin before the switch statement and open the file like this:
fin.open("....");

[dwks]

In order to use the ifstream fin variable that you declare inside the switch statement, you need to declare it outside the switch statement. For example:

ifstream fin;
switch(choose) {
case 1:
    fin.open("whatever.txt");
    // ...
}

while(fin >> whatever) // ...

[edit] Wow, I was beaten by over half an hour. Sorry.

Just one other thing to add: why not let the user enter the name of the file themselves? That way you don't have to worry about the switch statement or anything . . . . [/edit]

[Q8iEnG]

Well, thanks a lot for trying to help

I just did create a function, and I implement all things in main into it, so that when the user choose 1, from a switch loop in main, it'll call the function xD

thanks :)