From ce97c38f1b73e5a4d94c8bae4d56b488356c6ffc Mon Sep 17 00:00:00 2001
From: Jesse Brault <jbrault@mac.com>
Date: Sun, 9 Feb 2025 16:22:52 -0600
Subject: [PATCH] Initial attempt at add-two-numbers.

---
 .gitignore                      |  3 +-
 add-two-numbers/.gitignore      |  1 +
 add-two-numbers/Makefile        |  5 ++++
 add-two-numbers/addTwoNumbers.c | 50 +++++++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 add-two-numbers/.gitignore
 create mode 100644 add-two-numbers/Makefile
 create mode 100644 add-two-numbers/addTwoNumbers.c

diff --git a/.gitignore b/.gitignore
index 693222e..9f4068e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-*.dSYM
\ No newline at end of file
+*.dSYM
+.vscode
\ No newline at end of file
diff --git a/add-two-numbers/.gitignore b/add-two-numbers/.gitignore
new file mode 100644
index 0000000..3ca0d84
--- /dev/null
+++ b/add-two-numbers/.gitignore
@@ -0,0 +1 @@
+addTwoNumbers
\ No newline at end of file
diff --git a/add-two-numbers/Makefile b/add-two-numbers/Makefile
new file mode 100644
index 0000000..5c9e371
--- /dev/null
+++ b/add-two-numbers/Makefile
@@ -0,0 +1,5 @@
+addTwoNumbers: addTwoNumbers.c
+	gcc -g -Wall -std=gnu99 -o addTwoNumbers addTwoNumbers.c
+
+run: addTwoNumbers
+	./addTwoNumbers
\ No newline at end of file
diff --git a/add-two-numbers/addTwoNumbers.c b/add-two-numbers/addTwoNumbers.c
new file mode 100644
index 0000000..3c5194d
--- /dev/null
+++ b/add-two-numbers/addTwoNumbers.c
@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+struct ListNode {
+    int val;
+    struct ListNode *next;
+};
+
+/**
+ * Definition for singly-linked list.
+ * struct ListNode {
+ *     int val;
+ *     struct ListNode *next;
+ * };
+ */
+ struct ListNode* addTwoNumbers(struct ListNode* l1, struct ListNode* l2) {
+    struct ListNode *first = NULL, *current = NULL;
+    while (l1 != NULL) {
+        if (current == NULL) {
+            current = malloc(sizeof(struct ListNode));
+            first = current;
+        } else {
+            current->next = malloc(sizeof(struct ListNode));
+            current = current->next;
+        }
+        current->val = l1->val + l2->val;
+        l1 = l1->next;
+        l2 = l2->next;
+    }
+    return first;
+}
+
+int main() {
+    struct ListNode *l1 = malloc(sizeof(struct ListNode));
+    l1->val = 1;
+    l1->next = malloc(sizeof(struct ListNode));
+    l1->next->val = 2;
+    l1->next->next = NULL;
+
+    struct ListNode *l2 = malloc(sizeof(struct ListNode));
+    l2->val = 3;
+    l2->next = malloc(sizeof(struct ListNode));
+    l2->next->val = 4;
+    l2->next->next = NULL;
+
+    struct ListNode *result = addTwoNumbers(l1, l2);
+    printf("[%d, %d]\n", result->val, result->next->val);
+
+    return 0;
+}
\ No newline at end of file