From 09f56fca17ffd61be30688181325b6485a0a2d7c Mon Sep 17 00:00:00 2001
From: Alex Karle <alex@alexkarle.com>
Date: Wed, 1 Dec 2021 09:43:34 -0500
Subject: [PATCH] day1: Add C solution

---
 .gitignore   |  3 +++
 1/c/Makefile |  5 +++++
 1/c/a.c      | 16 ++++++++++++++++
 1/c/b.c      | 26 ++++++++++++++++++++++++++
 4 files changed, 50 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 1/c/Makefile
 create mode 100644 1/c/a.c
 create mode 100644 1/c/b.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d0b311e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+# compiled solutions
+a
+b
diff --git a/1/c/Makefile b/1/c/Makefile
new file mode 100644
index 0000000..a2a6c98
--- /dev/null
+++ b/1/c/Makefile
@@ -0,0 +1,5 @@
+a: a.c
+	$(CC) -o $@ $<
+
+b: b.c
+	$(CC) -o $@ $<
diff --git a/1/c/a.c b/1/c/a.c
new file mode 100644
index 0000000..39ce157
--- /dev/null
+++ b/1/c/a.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int main(void) {
+    int count = 0;
+    int curr;
+    int prev = 0;
+    while(fscanf(stdin, "%d\n", &curr) != EOF) {
+        if (prev && curr > prev) {
+            count++;
+        }
+        prev = curr;
+    }
+    printf("%d\n", count);
+    return 0;
+}
diff --git a/1/c/b.c b/1/c/b.c
new file mode 100644
index 0000000..00e35c7
--- /dev/null
+++ b/1/c/b.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int mem[] = {0, 0, 0};
+int sum() {
+    return mem[0] + mem[1] + mem[2];
+}
+
+int main(void) {
+    int count = 0;
+    int curr;
+    int prev = 0;
+    int i = 0;
+    while(fscanf(stdin, "%d\n", &curr) != EOF) {
+        mem[i++ % 3] = curr;
+        if (i > 3) {
+            if (prev && sum() > prev) {
+                count++;
+            }
+            prev = sum();
+        }
+        i++;
+    }
+    printf("%d\n", count);
+    return 0;
+}
--
libgit2 1.8.1