// ProductBarcodeGenerator.cpp : Creates EAN-13 Barcode numbers based on your 4-digit code entry. // This Barcode Generator is done for fun, for the company I work for. Our products barcodes // have a standard set of digits. The first digits are 52014290 and I have therefore set them as standard. // The next step would be to get the user to enter them all manually. This is my 2nd code in C++ :) // Feel free to comment! I will of course tidy up the code even further! #include "stdafx.h" #include #include #include using namespace std; int standardCode[8] = {5, 2, 0, 1, 4, 2, 9, 0}; // storing the standard digits in an array int evenNumbers; // we will need the even numbers stored in a variable to sum them up together and then multiply them by 3 int oddNumbers; // we will need the odd numbers stored in a variable to sum them up and later on add them to the above result int productCode[4]; // the standard 4-digit code of the company's products int numbersSum = 0; // this is the total sum variable that is set to 0 in the beginning. int main() { cout << "Please enter your 4-digit Product Code: " << endl; cout << "Digit 1: "; cin >> productCode[0]; cout << endl; // user enters the 1st digit of the 4-digit product code cout << "Digit 2: "; cin >> productCode[1]; cout << endl; // user enters the 2nd digit of the 4-digit product code cout << "Digit 3: "; cin >> productCode[2]; cout << endl; // user enters the 3rd digit of the 4-digit product code cout << "Digit 4: "; cin >> productCode[3]; cout << endl; // user enters the 4th digit of the 4-digit product code cout << "The Code you have entered is: " << productCode[0] << productCode[1] << productCode[2] << productCode[3] << endl; // we present the code that the user entered. We need all digits stored separately. evenNumbers = standardCode[1] + standardCode[3] + standardCode[5] + standardCode[7] + productCode[1] + productCode[3]; // we sum up all the even numbers of the barcode oddNumbers = standardCode[0] + standardCode[2] + standardCode[4] + standardCode[6] + productCode[0] + productCode[2]; // we sum up all the odd numbers of the barcode cout << "The Sum of even numbers is: " << evenNumbers << endl; int evenNumbers3 = evenNumbers * 3; // we multiply the sum of the even numbers by 3 cout << "Times 3: " << evenNumbers3 << endl; // and we present the result on the user's screen. cout << "The Sum of the odd numbers is: " << oddNumbers << endl; // we present the sum of the odd numbers on the user's screen. cout << "The total Sum is: " << evenNumbers3 + oddNumbers << endl; // we sum everything up and print it on the user's screen. float finalSum = evenNumbers3 + oddNumbers; // we use a new float variable in order to later on round up the result to the next multiple of 10 cout << "finalSum is: " << finalSum << endl; // we print that number on the user's screen. // printf("%f", ceil(finalSum / 10) * 10); // we use ceil to round up that final number up to the next multiple of 10 int finalSum2 = (ceil(finalSum / 10) * 10); // we use a new variable named finalSum2 for the rounded up number cout << endl; cout << "Rounded Up number of finalSum now is: " << finalSum2 << endl; // and print it on the screen int remainder = finalSum2 - finalSum; // we subtract from the new rounded up number, the sum of the odd numbers and the multipled (by 3) sum of the even numbers cout << "Remainder (or else our 13th checksum digit) should be: " << remainder << endl; // here we print the remainder on the screen, which is also our 13th checksum digit cout << "The barcode so far is this: " << endl; // here we print the whole barcode cout << standardCode[0]; cout << standardCode[1]; cout << standardCode[2]; cout << standardCode[3]; cout << standardCode[4]; cout << standardCode[5]; cout << standardCode[6]; cout << standardCode[7]; cout << productCode[0]; cout << productCode[1]; cout << productCode[2]; cout << productCode[3]; cout << remainder << endl; // here we print the 13th checksum digit cout << endl; cout << "Violets are Blue, Roses are Red, I have no idea what I'm doing, have a wonderful day and listen to Slayer!" << endl; // we are just being kind to the user :) cout << endl; system("PAUSE"); // we allow the user to press any key after they check the barcode. return 0; }

EAN-13 Barcode generator with checksum digit