Thread: Reading a file!!!!!!!!

I want to read the information from (store.ddf) in a sorted manner, lets just say i want the description of item 11111 stored in file (stores.ddf), how would i do this?

if the question is to broad and i'm just going to go have a look at fstream function i will do this.

Code:

#include <stdio.h>
#include <iostream>
#include <fstream>

 using namespace std;



void rfile()
{

char string[100];

ifstream bfile;
bfile.open("stores.ddf");
// read function are here

bfile.read(string,ios::end);

cout<< string;
cin.ignore(1000, '\n' );




};


void file(int a, int b, char c[100])
{

char string[100];

ofstream file;
file.open("stores.ddf",ios::app);
file<<" ITEM "<< b <<" Quantity "<< a <<" Description "<< c <<endl;
file.close();

}

struct product
{
int item;
char des[256];
int qty;
};


int main()
{

 int itemN, qtyN, *b;
 char ans, items[256];


do {

cout<<"\nPlease enter the item description > ";
cin.getline(items,256);
cout<<"Please enter the item number >";
cin>> itemN;
cout<<"please enter the quanity counted >";
cin>> qtyN;

product descrip;


descrip.item=itemN;
descrip.qty=qtyN;
descrip.des=items;


cout<<"\nThis is the data you have entered\n";
cout<<"\nItem description > "<< descrip.des;
cout<<"\nItem > "<< descrip.item;
cout<<"\nQuantity > "<< descrip.qty <<"\n";
cout<<"\nIs this correct (Y/N) > ";
cin>> ans;

file(descrip.qty,descrip.item,descrip.des);

} while ( ans=='n' );

char q;


cout<<"\nWould you like to read the file > ";
cin>> q;

if (q=='y') {
rfile();
} else {

char w;

cout<<"\nWould you like to clear the file > ";
cin>> w;

if (w=='y'){
ofstream afile;
afile.open("store.ddf",ios::trunc);
afile.close();
} else {
return 0;
};





};
}

>descrip.des=items;

That is wrong, C++ forbids an assinment of an array. Just looking over the rest of the code.

Originally Posted by swgh

>descrip.des=items;

That is wrong, C++ forbids an assinment of an array. Just looking over the rest of the code.

it works ? i was told to use strcpy(); but this worked so i left it, i dunno.

but this worked so i left it, i dunno

It works while you are still in the function
when you exit - your local variable is destoyed and you get a dangling pointer...

Originally Posted by vart

It works while you are still in the function
when you exit - your local variable is destoyed and you get a dangling pointer...

Ok, i can fix that but what about my reading a file question?

Search google for File I/O.

Originally Posted by manutd

Search google for File I/O.

HeHeHE, ok, well if you feel like giving me some tip i would appreciate it.

Another.