C++ :: Creating A Game - Read Prices Of Object Inputted By User From A File

How do i read a specific part of a file? I am trying to create a game that reads the prices of an object inputted by the user from a file. This is the code i have so far

#include <iostream>
#include <fstream>
using namespace std;
int main () {
ifstream infile;
infile.open ("Objects.txt", ifstream::in);

[Code] ....

The file contains this :

Example objects
( ) store items
(item) (purchase value)/(sell value)

Grocery Store Items
Fish 5 7
Vegetables 10 15
Drinks 20 30

Weapon Store Items
Pistol 300 375
Rifle 400 500
Ammunition 20 30