hi guys......i need to write a C++ program to allow the user to store new albums in a text file, be ale to view all his records at any time, to delete any particular record in the text file, to search for a particular record n decrement the quantity in stock of an album when there is a sale......here is what i managed to do until now
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include <sstream>
#include <cstdio>
using namespace std;
void do_again(),direction(int ans);
void option_1(),option_2(),option_3(),option_4(),option_5(),option_6();
void choice_1();
struct item
{
string name,artist,category;
int stock;
float price;
int count;
item *nxt;
};
item *p=NULL;
item *current;
int main()
{
do_again(); //call do_again function, main remains hidden @ the back until everything else is done running
return 0;
} //end function
void do_again()
{
int ans; //declare ans variable
do
{
cout << "\t\t\t\t Main Menu\n";
cout << "\t\t\t\t ---------\n\n";
cout << " *******************************************************************\n";
cout << " * *\n";
cout << " * Add a new album ......................................... [1] *\n";
cout << " * *\n";
cout << " * Search for a particular album ........................... [2] *\n";
cout << " * *\n";
cout << " * Delete an album ......................................... [3] *\n";
cout << " * *\n";
cout << " * Print all albums ........................................ [4] *\n";
cout << " * *\n";
cout << " * Sales ................................................... [5] *\n";
cout << " * *\n";
cout << " * Exit .................................................... [6] *\n";
cout << " * *\n";
cout << " *******************************************************************\n";
cout << "\n -> Enter Selection : ";
cin >> ans;
cin.ignore(80,'\n'); //take in an answer
direction(ans); //send that answer to direction!
}
while(ans!=6); //keep on keepin on till exit is picked!
} //end function
void direction(int ans)
{
switch (ans) //roll through options
{
case 1: option_1(); //go to function 1
break;
case 2: option_2(); //go to function 2
break;
case 3: option_3(); //go to function 3
break;
case 4: option_4(); //go to function 4
break;
case 5: option_5(); //go to function 5
break;
case 6: option_6(); //go to function 6
break;
default: cout << "Please read and follow all directions\n"; //if directions aren't followed
break;
}
} //end function
//Functions
void option_1()
{
system("CLS");
item *list,*temp2;
list = new item;
cout<<"Album details\n";
cout<<"-------------\n\n";
cout<<"Album Name: ";
getline(cin, list->name);
cout<<"Album Artist: ";
getline(cin, list->artist);
cout<<"Category: ";
cin>>list->category;
cout<<"Amount Bought: ";
cin>>list->stock;
cout<<"Price: ";
cin>>list->price;
list->nxt=NULL;
if (p == NULL)
{
p = list;
current=p;
}
else
{
temp2 = p;
while (temp2->nxt != NULL)
{
temp2 = temp2->nxt;
}
temp2->nxt = list;
}
item *temp;
temp = p;
ofstream f;
f.open("database.txt", ios::app); //opens the file database.txt and appends it....else creates it if it doesnt exist
while (temp != NULL)
{
f<<"Album Name : " <<temp->name<<endl;
f<<"Album Artist : " <<temp->artist<<endl;
f<<"Category : " <<temp->category<<endl;
f<<"Amount in Stock : " <<temp->stock<<endl;
f<<"Price : " <<temp->price<<endl;
f<<"----------------------------------";
f<<"\n\n";
temp = temp->nxt;
}
f<<endl;
// displaying item entered
cout<<"\nAlbum " << list->name<<" added successfully.\n\n";
f.close(); //closes the text file
choice_1(); //go to function choice_1
system("CLS");
}//end function
void option_2()
{
system("CLS");
//opens the text file database.txt or displays error message if not found
ifstream in_file("database.txt");
if (!in_file.is_open())
{
system("CLS");
cerr << "Error: could not find the database file\n" << endl;
system("pause");
system("CLS");
return;
}
// read album name to look for
item album_info;
cout << "Enter the Album Name: ";
if (!getline(cin, album_info.name))
{
cerr << "Error while reading from keyboard.\n";
cin.clear();
return;
}
// read line for line as long no error occurs
string line;
while (getline(in_file, line))
{
size_t pos = line.find(album_info.name);
if (pos == string::npos)
{
continue;
}
// if you pass here, you found your album by name
const string kPrefixAlbumLines[] = {"Album Artist : ","Category : ","Amount in Stock : ","Price : "};
string album_lines[4];
for (int i = 0; i < 4; i++)
{
if (!getline(in_file, album_lines[i]))
{
cerr << "An error occured while reading from file.\n";
return;
}
album_lines[i].erase(0, kPrefixAlbumLines[i].length());
}
album_info.artist = album_lines[0];
stringstream converter;
converter.str(album_lines[1]);
if (!(converter >> album_info.category))
{
cerr << "Corruped data entry in category field!\n\n";
}
converter.str(album_lines[2]);
converter.clear();
if (!(converter >> album_info.stock))
{
cerr << "Corruped data entry in stock field!\n\n";
}
converter.str(album_lines[3]);
converter.clear();
if (!(converter >> album_info.price))
{
cerr << "Corruped data entry in price field!\n\n";
}
}
in_file.close(); //closes the text file
//display error message if album name entered is not found
if (album_info.artist.length() == 0)
{
cout << "\n\nThe album doesnt exist or the name has been mispelled"<< endl;
cin.get();
system("CLS");
return;
}
//display required album information onto screen
cout << endl << endl;
cout << "Album Name : " << album_info.name << endl;
cout << "Album Artist : " << album_info.artist << endl;
cout << "Category : " << album_info.category << endl;
cout << "Amount in Stock : " << album_info.stock << endl;
cout << "Price : " << album_info.price << endl;
cout << "\n\n";
system("pause");
system("CLS");
}//end function
void option_3()
{
}//end function
void option_4()
{
system("CLS");
string line;
ifstream f("database.txt");
if (!f.is_open())
{
system("CLS");
cerr << "Error: could not find the database file\n" << endl;
system("pause");
system("CLS");
return;
}
if (f.is_open())
{
//while the end of file is not encountered store everything in text file in string "line" and output "line" to the screen
while (! f.eof() )
{
getline (f,line);
cout << line << endl;
}
f.close();
system("pause");
system("CLS");
}
else cout << "Unable to open file";
}//end function
void option_5()
{
}//end function
void option_6()
{
}//end function
void choice_1()
{
char ans;
cout<<"Do you want to enter another item?(y/n)";
cin>>ans;
if((ans=='Y') || (ans=='y'))
{
option_1();
}
if((ans=='N') || (ans=='n'))
{
}
else
{
cout << "\nWrong choice!!\n\n";
choice_1();
}
}i am sort of new to programming and i wrote all this from examples i found here and there and adjusted the codes for my program
there is a problem with my insert code....that is the option_1() function.....whenether i add a new album...i get the message whether to add another album or not
if i press "y"....i can't enter data for the first element of my struct...that is the album name
Also...if press "n" and returns to the main menu and then decides to enter a new album and press "1" again....it rewrites all the details of the previous album i entered again in the text file in addition to the new details i enter
please help!!!