writing an array

Hi,

I am having trouble writing code that will read the index of a
value located in another file, that the user is searching for. I have an external file that contains part numbers, along with data about each part. What I want to do is to be able to enter a part number, search the file for that part number and return the index (where that part number is in the file) so that later I can read whatever data I want from that line.
My biggest obstacle at the moment is the syntax to be used when I want to read in data from the file to the instream so that I can do something with it.

Code:

---



#include <iostream>      // cout, cin, <<, >>
#include <fstream>        // ifstream
#include <string>        // string  (future)
#include <vector>        // vector<T>  (future)
#include <algorithm>      // max, min_element() (future)
// #include "myVector.h"  // read(), mean()  (future)
#include <cassert>        // assert
using namespace std;

const int CAPACITY = 3;
const int DOLLARS = 9999;
int number[CAPACITY] = {0};
int price[DOLLARS] = {0};
int key = 0;

int main()
{

ifstream inFile("product.txt");
assert(inFile.is_open());
inFile >> number >> price;

cout << "Enter a product number: ";
cin >> key;

for (int i = 0; i <= CAPACITY; i++)
{
    if (key == number[i]) //find the file index where value of key is stored
        {
                return i;
        }
}
return -1;

cout << "The index is: " << number[i]; // display the index, so that it can be used later.

}

---

The command

Code:

---

inFile >> number >> price

---

generates a "binary >>" error, saying that there is no operator which takes a right hand operand of type int[3].

I believe the compiler has a point, but I don't know what to do to make it happy. Any thoughts or ideas?
I am using MSVS.net 2003

Thanks.

>const int CAPACITY = 3;
>const int DOLLARS = 9999;
>int number[CAPACITY] = {0};
>int price[DOLLARS] = {0};

For each part number, you will have a price for that part, so why are you declaring these arrays of different sizes. You have one with 3 elements, and one with 9999 elements.

>inFile >> number >> price;
If number and price are arrays, you can read the whole list of part numbers and prices into these arrays. Use a loop for this:

Code:

---

int n = 0;
while (inFile >> number[n] >> price[n])
  n++;

---

That's one idea.