exp 12: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

12.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct Item item;
+struct Item {
+  unsigned int key;
+  int value;
+};
+
+unsigned int hash(char *x, unsigned int n) {
+  const unsigned int offset = 2166136261;
+  unsigned int hash = 0;
+
+  for (unsigned int i = 0; i < n; x++, i++) {
+    hash *= offset;
+    hash ^= (*x);
+  }
+
+  return hash;
+}
+
+int search(item items[], int n, char *x, int xn) {
+  unsigned int key = hash(x, xn);
+  for (int i = 0; i < n; i++) {
+    if (items[i].key == key)
+      return items[i].value;
+  }
+
+  printf("Not found");
+  exit(1);
+}
+
+int main() {
+  int const SIZE = 4;
+  item items[SIZE];
+  items[0].key = hash("nita", 4);
+  items[0].value = 99;
+  items[1].key = hash("amaang", 5);
+  items[1].value = -129;
+  items[2].key = hash("unreal", 6);
+  items[2].value = 4;
+  items[3].key = hash("alpaviraam", 10);
+  items[3].value = 10000;
+
+  char x[] = "unreal";
+
+  printf("Value for string %s is: %d", x, search(items, SIZE, x, 6));
+}