Inventory Report operator<<

Build a class Inventory:
1. Inventory() — starts empty
2. void add(const string& name, int qty, double price) — appends one item (keep insertion order)
3. a free ostream& operator<<(ostream& os, const Inventory& inv) that writes the report below and returns os

Report format, every line ending in a newline:
- Header line: Item left-aligned in 10 columns, then Qty right-aligned in 3 columns, then Price right-aligned in 8 columns
- One line per item, in the order added: name left-aligned in 10 columns, qty right-aligned in 3 columns, price right-aligned in 8 columns with exactly 2 decimals
- Last line: Total:  followed by the sum of qty times price over all items, with exactly 2 decimals

An empty inventory prints only the header line and Total: 0.00. Write to os, never to cout.

After adding apple (4 at 1.25) and bread (3 at 2.50) (see Expected Output).

Do NOT write a main function.

Expected Output:

Item      Qty   Price↵
apple       4    1.25↵
bread       3    2.50↵
Total: 12.50↵
Item      Qty   Price↵
Total: 0.00↵
Item      Qty   Price↵
pen        12    0.50↵
Total: 6.00↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

Streamsostream

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