How to read a txt file into an array of structures?

[sambix]

I can't get my array to read my file properly. When I run the program, it doesn't read my file properly....what am I doing wrong?


#include "stdafx.h"
#include <iostream>
#include <cmath>
#include <math.h>
#include <iomanip>
#include <string>
#include <fstream>

using namespace std;

struct machine {
string name;
double cost;
int num;
};

int main() {

double userMoney;
int i; //count
int leftover;
double change;
const int size = 5;
ifstream file;
file.open("sodas.txt");

machine vending[size] = {};

file >> vending[size].name >> vending[size].cost >> vending[size].num;
//AM I DOING THIS PART RIGHT? IM READING THE FILE INTO THE ARRAY OF STRUCTURES....I THINK


// TEST IF MY FILE WAS READ INTO ARRAY
cout << vending[size].name << " " << vending[size].cost << " " << vending[size].num << endl;
//TEST IF MY FILE WAS READ INTO THE ARRAY


cout << "Please choose a drink :-)" << endl;
cout << "1: Cola" << endl;
cout << "2: Root Beer" << endl;
cout << "3: Lemon-Lime" << endl;
cout << "4: Grape Soda" << endl;
cout << "5: Cream Soda" << endl;
cout << "6: Quit :(" << endl;

int choice;
cin >> choice;

switch (choice) {
case 1: cout << "You chose Cola! Enter the amount of money inserted in dollars." << endl;
cin >> userMoney;
if (userMoney <= 1 && userMoney > 0) {
change = userMoney - vending[size].cost;
cout << "Your change is " << change << " dollars" << endl;
leftover = vending[size].num - 1;
}
else {}
break;

case 2: cout << "You chose Root Beer! Enter the amount of money inserted in dollars." << endl;
cin >> userMoney;
if (userMoney <= 1 && userMoney > 0) {
change = userMoney - vending[size].cost;
cout << "Your change is " << change << " dollars" << endl;
if (vending[size].num < 1) {
cout << "SOLD OUT :(" << endl;
}
else {
leftover = vending[size].num - 1;
}
}
else {}
break;
case 3: cout << "You chose Lemon Lime Soda! Enter the amount of money inserted in dollars." << endl;
cin >> userMoney;
if (userMoney <= 1 && userMoney > 0) {
change = userMoney - vending[size].cost;
cout << "Your change is " << change << " dollars" << endl;
if (vending[size].num < 1) {
cout << "SOLD OUT :(" << endl;
}
else {
leftover = vending[size].num - 1;
}
}
else {}
break;
case 4: cout << "You chose Grape Soda! Enter the amount of money inserted in dollars." << endl;
cin >> userMoney;
if (userMoney <= 1 && userMoney > 0) {
change = userMoney - vending[size].cost;
cout << "Your change is " << change << " dollars" << endl;
if (vending[size].num < 1) {
cout << "SOLD OUT :(" << endl;
}
else {
leftover = vending[size].num - 1;
}
}
else {}
break;
case 5: cout << "You chose Cream Soda! Enter the amount of money inserted in dollars." << endl;
cin >> userMoney;
if (userMoney <= 1 && userMoney > 0) {
change = userMoney - vending[size].cost;
cout << "Your change is " << change << " dollars" << endl; \
if (vending[size].num < 1) {
cout << "SOLD OUT :(" << endl;
}
else {
leftover = vending[size].num - 1;
}
}
else {}
break;
case 6: cout << "You have quit the vending machine :((" << endl;
system("pause");
return 0;
}

system("pause");
return 0;
}

[Thomas1965]

it doesn't read my file properly

What is the output?
How does your input file look like?
You need to check first if the file opened correctly before you can use it.

[lastchance]

You declared an array vending[] with dimension size. This means that the elements of this array are
vending[0], vending[1], ... vending[size-1].

Thus, when you refer to vending[size] throughout your program you are going beyond the end of the array. You are probably intending to loop through the elements of the array.

I think that you need to read up on arrays (and loops) first.

Please put your code within code tags. It is impossible to see its structure without.

[teerguru]

Please tell me what is the output?