Add presentation: 2026-linuxdays

1 files changed, 31 insertions, 0 deletions

diff --git a/2026-linuxdays/simple.c b/2026-linuxdays/simple.c
new file mode 100644
index 0000000..75c5de2
--- /dev/null
+++ b/2026-linuxdays/simple.c
@@ -0,0 +1,31 @@
+#define CHAR_BIT 8
+
+unsigned loop(unsigned x) {
+  while (x > 0)
+    x--;
+  return x;
+}
+
+int add2(int a, int b) { return a + b; }
+int add9(int a, int b, int c, int d, int e, int f, int g, int h, int i) {
+  return a + b + c + d + e + f + g + h + i;
+}
+
+void call_add(void) {
+  add2(1, 2);
+  add9(1, 2, 3, 4, 5, 6, 7, 8, 9);
+}
+
+struct px {
+  int x, y;
+};
+int x_plus_y(struct px *p) { return p->x + p->y; }
+
+int div2_a(unsigned x) { return x / 2; }
+int div2_b(unsigned x) { return x >> 1; }
+
+int abs_a(int x) { return x < 0 ? -x : x; }
+int abs_b(int x) {
+  int m = x >> (sizeof(x) * CHAR_BIT - 1);
+  return (x + m) ^ m;
+}