How to Create a Cash Register Program Using C

Creating a simple cash register program in C programming involves several components, including handling user input, performing calculations, and displaying results. This article provides a step-by-step guide to building a basic cash register program. You will learn how to input item prices, calculate total costs, handle payment, and manage change.

Code Example

#include 
#include 
#include  // for std::setprecision
using namespace std;
textcopy
int main() {
    vector prices;
    double price;
    char addMore;
    // Input loop for item prices
    do {
        cout  "Enter item price (or 'q' to quit): "  endl;
        cin  price;
        prices.push_back(price);
        cout  "Do you want to add more items? (y/n): "  endl;
        cin  addMore;
    } while (addMore  'y' || addMore  'Y');
    // Calculate total
    double total  0.0;
    for (double p : prices) {
        total   p;
    }
    // Display total cost
    cout  fixed  setprecision(2) 

Explanation of the Code

Includes and Using Namespace

#include - For input and output operations. #include - To use the vector container for storing item prices. #include - For formatting output, particularly for setting decimal precision.

Main Function

A vectordouble prices is used to store the prices of the items. A loop allows the user to enter multiple item prices until they choose not to add more items.

Total Calculation

The program calculates the total cost of all items entered by summing their prices.

Payment Handling

The program prompts the user for the payment amount and checks if it is sufficient. If the payment is less than the total, it prompts for additional payment. If the payment is sufficient, it calculates and displays the change.

How to Compile and Run

To compile and run this program, follow these steps:

Save the code in a file named cash_register.cpp. Open a terminal or command prompt. Navigate to the directory where the file is saved. Compile the program using a C compiler such as g with the following command: g -o cash_register cash_register.cpp To run the compiled program, use the following command: ./cash_register

Further Enhancements

This basic program can be expanded with additional features such as:

Item names or descriptions. Discounts or tax calculations. Receipt generation. Error handling for invalid input, e.g., non-numeric values for prices.

Feel free to customize and enhance the program based on your needs!