From 72511089e383d3b7a6af7c426d85e61b31ff5289 Mon Sep 17 00:00:00 2001
From: SowinskiBraeden <braeden@sowinski.dev>
Date: Wed, 29 Oct 2025 23:06:55 -0700
Subject: [PATCH] complete lab02

---
 assignment02/project1.c | 45 +++++++++++++++++++++++++++++++++++++++++
 assignment02/project2.c | 36 +++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 assignment02/project1.c
 create mode 100644 assignment02/project2.c

diff --git a/assignment02/project1.c b/assignment02/project1.c
new file mode 100644
index 0000000..70345e4
--- /dev/null
+++ b/assignment02/project1.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+
+/**
+ * Course: COMP 2510
+ * Assignment: Assignment 2
+ * Name: Braeden Sowinski
+ * Student ID: A01385066
+ * Date: 2025-10-29
+ * Description: Checks if both the second
+ * and fourth bit of a given number are
+ * on or not.
+ */
+void printBinary(int n)
+{
+    printf("Binary: ");
+
+    // sizeof(int) * 2 - 1 = number of bits. i.e. 7 bits, range 7 to 0 inclusive
+    for (int i = sizeof(int) * 2 - 1; i >= 0; i--)
+    {
+        // shift bit 'i' to bit index 0, use '&' to check if bit is 1 or 0
+        printf("%d", (n >> i) & 1);
+    }
+    printf("\n");
+}
+
+int areSecondAndFourthBitsOn(int n)
+{
+    int mask = 0b00010100;
+
+    return (n & mask) == mask;
+}
+
+int main(void)
+{
+    int n;
+
+    printf("Enter an integer: ");
+    scanf("%d", &n);
+
+    printBinary(n);
+    areSecondAndFourthBitsOn(n) == 1 ? printf("Second and fourth bits are ON.\n") :
+                                       printf("Second and fourth bits are NOT both ON.\n");
+
+    return 0;
+}
diff --git a/assignment02/project2.c b/assignment02/project2.c
new file mode 100644
index 0000000..104e481
--- /dev/null
+++ b/assignment02/project2.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+/**
+ * Course: COMP 2510
+ * Assignment: Assignment 2
+ * Name: Braeden Sowinski
+ * Student ID: A01385066
+ * Date: 2025-10-29
+ * Description: Sum of digits uses recursion to
+ * calculate the sum of digits of a number.
+ * e.g. 12345 -> 1 + 2 + 3 + 4 + 5 = 15
+ */
+int sumOfDigits(int n)
+{
+    if (n == 0)
+    {
+        return 0;
+    }
+
+    return (n % 10) + sumOfDigits(n / 10);
+}
+
+int main(void)
+{
+    int n;
+    int sum;
+
+    printf("Enter a number: ");
+    scanf("%d", &n);
+
+    sum = sumOfDigits(n);
+
+    printf("Sum of digits = %d\n", sum);
+
+    return 0;
+}