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MP4 progress

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Chloe Fontenot 🏳️‍⚧️
2022-11-11 18:20:23 -06:00
parent 51b6f821df
commit 4a97e1fe67
18 changed files with 2337 additions and 20 deletions
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92
Assignments/MP4_CalebFontenot/src/mp4_calebfontenot/MP4_CalebFontenot.java
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@@ -11,15 +11,27 @@ package mp4_calebfontenot;
*/
public class MP4_CalebFontenot {
static boolean debug = true;
/**
* If the result from Step 4 is divisible by 10, the card number is valid; otherwise, it is invalid. For example, the number 4388576018402626 is invalid, but the number 4388576018410707 is valid
*
* @param CreditCard
* @return
*/
public static boolean isValid(String CreditCard) {
public static boolean isValid(String CreditCard)
{
int sumResult = MP4_CalebFontenot.sum(MP4_CalebFontenot.doubleDigitsAndSumSingleDigits(CreditCard), MP4_CalebFontenot.addOddNumbersFromRightToLeft(CreditCard));
int divisionResult = sumResult % 10;
if (debug) {
System.out.println(sumResult + ", " + divisionResult);
}
if (divisionResult == 0) {
return true;
}
else {
return false;
}
}
/**
@@ -29,8 +41,9 @@ public class MP4_CalebFontenot {
* @param step3 result form step 3
* @return
*/
public static int sum(int step1andSep2, int step3) {
return step1andSep2 + step3;
public static int sum(int step1andStep2, int step3)
{
return step1andStep2 + step3;
}
/**
@@ -39,8 +52,25 @@ public class MP4_CalebFontenot {
* @param -creditCard the credit card number to be processed.
* @return the sum of digits at odd position from right to left.
*/
public static int addOddNumbersFromRightToLeft(String creditCard) {
return -1;
public static int addOddNumbersFromRightToLeft(String creditCard)
{
if (debug) {
System.out.println("Now executing addOddNumbersFromRightToLeft()");
}
// Iterate through string
int creditCardLength = creditCard.length();
int currentDigit, digitProduct, tensDigit, onesDigit, sum = 0;
//System.out.println(creditCard.length());
for (int i = 0; i <= (creditCardLength -1); i = i + 2) {
currentDigit = Character.getNumericValue(creditCard.charAt(i)); // Parses current digit as an integer so we can do math on it
sum += currentDigit;
if (debug) {
System.out.println(currentDigit);
System.out.println("sum: " + sum);
}
}
return sum;
}
/**
@@ -49,25 +79,35 @@ public class MP4_CalebFontenot {
* @param -creditCard the credit card number to be processed.
* @return
*/
public static int doubleDigitsAndSumSingleDigits(String creditCard) {
public static int doubleDigitsAndSumSingleDigits(String creditCard)
{
if (debug) {
System.out.println("Now executing doubleDigitsAndSumSingleDigits()");
}
// Iterate through string
int creditCardLength = creditCard.length();
int currentDigit, digitProduct, tensDigit, onesDigit;
int currentDigit, digitProduct, tensDigit, onesDigit, sum = 0;
//System.out.println(creditCard.length());
for (int i = 15; i >= 0; i = i - 2) {
for (int i = (creditCardLength -1); i >= 0; i = i - 2) {
currentDigit = Character.getNumericValue(creditCard.charAt(i)); // Parses current digit as an integer so we can do math on it
digitProduct = currentDigit * 2;
System.out.println(digitProduct);
if (digitProduct > 9) { // Product is larger than 9
tensDigit = currentDigit / 10 % 10;
onesDigit = currentDigit / 1 % 10;
System.out.println("tensDigit is " + tensDigit);
System.out.println("onesDigit is " + onesDigit);
if (digitProduct > 9) { // Product is larger than 9. Typecast the integer back into a string so we can seperate the digits and add them together.
String workingString = Integer.toString(digitProduct);
tensDigit = Character.getNumericValue(workingString.charAt(0));
onesDigit = Character.getNumericValue(workingString.charAt(1));
if (debug) {
System.out.println("tensDigit is " + tensDigit);
System.out.println("onesDigit is " + onesDigit);
}
digitProduct = (tensDigit + onesDigit);
}
sum += digitProduct;
if (debug) {
System.out.println(digitProduct);
}
}
return -1;
return sum;
}
/**
@@ -75,7 +115,8 @@ public class MP4_CalebFontenot {
*
* @return a string with credit card number or 0.
*/
public static String menu() {
public static String menu()
{
return "creditcard number or 0";
}
@@ -83,10 +124,21 @@ public class MP4_CalebFontenot {
*
* @param args
*/
public static void main(String[] args) {
public static void main(String[] args)
{
// DEBUG
//System.out.println(isValid("4388576018402626"));
MP4_CalebFontenot.doubleDigitsAndSumSingleDigits("4388576018402626");
String sampleCreditCard = "4388576018410707";
boolean creditCardValidity = MP4_CalebFontenot.isValid(sampleCreditCard);
String validityString;
if (creditCardValidity) {
validityString = "valid";
} else {
validityString = "invalid";
}
System.out.println("The credit card " + sampleCreditCard + " is " + validityString);
/*
String userInput = menu();