Merge pull request #2962 from mdmzfzl/main

Create: 0989-add-to-array-form-of-integer.c

Author: mdmzfzl

c/0989-add-to-array-form-of-integer.c

@@ -0,0 +1,43 @@
+int* addToArrayForm(int* A, int ASize, int K, int* returnSize) {
+    // Calculate the maximum size of the result array
+    int maxSize = (ASize > 6) ? ASize + 2 : 8;  // Maximum 6 digits in K, plus 2 for potential carry.
+
+    // Create the result array
+    int* result = (int*)malloc(maxSize * sizeof(int));
+    
+    // Initialize variables
+    int carry = 0;
+    int i = ASize - 1;
+    int j = 0;
+
+    // Perform the addition
+    while (i >= 0 || K > 0 || carry > 0) {
+        int sum = carry;
+        if (i >= 0) {
+            sum += A[i];
+            i--;
+        }
+        if (K > 0) {
+            sum += K % 10;
+            K /= 10;
+        }
+        
+        result[j] = sum % 10;
+        carry = sum / 10;
+        j++;
+    }
+    
+    // Reverse the result array
+    int left = 0;
+    int right = j - 1;
+    while (left < right) {
+        int temp = result[left];
+        result[left] = result[right];
+        result[right] = temp;
+        left++;
+        right--;
+    }
+
+    *returnSize = j;
+    return result;
+}