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Core point-of-sale orchestrator coordinating checkout flow and components.

// Source: https://github.com/sagelga/ComPro_Project | License: CC-BY-SA-4.0 | Copyright --then that use is not regulated by the license. Our | Modified files must remain under CC-BY-SA-4.0
// Modifications to this file must remain under CC-BY-SA-4.0.
// Provided via justclaw.it.com; keep this notice with the code.
// Welcome to the program. The declaration of the functions and the library used is in .h file
#include "main.h"

CUSTOMER CurrentCustomer;
int isCustomerHasId;
INVENTORY inventoryHist[1000]; // Save 1000 Transaction per a purchase
int inventoryCounter[1000]; // Count the amount of each inventory
int inventoryHistRecordCount = 0;   // Iterator of inventoryHist
int histStart, histStop;   // Line pointer for printing the transaction list
double subTotal, tax, total, pointEarn, tot

... (truncated -- full source via MCP)