Restore aoc backup.

2015/day01/answer01.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+int main() {
+	int32_t floor = 0;
+	
+	FILE *file = fopen("input", "r");
+	if (file == NULL) {
+		perror("Error opening file.");
+		return 1;
+	} 
+
+	char buffer[256];
+	while (fgets(buffer, sizeof(buffer), file) != NULL) {
+		uint16_t length = strlen(buffer);
+		for (uint16_t i = 0; i < length; i++) {
+			if (buffer[i] == '(') floor++;
+			else if(buffer[i] == ')') floor--;
+		}
+	}
+	if (ferror(file)) {
+		perror("Error reading from file.");
+		return 1;
+	}
+    fclose(file);
+
+	printf("floor: %i\n", floor);
+
+	return 0;
+}

2015/day01/answer02.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+int main() {
+	int32_t floor = 0;
+	uint32_t pos = 0;
+
+	FILE *file = fopen("input", "r");
+	if (file == NULL) {
+		perror("Error opening file.");
+		return 1;
+	}
+
+	char buffer[256];
+	bool breakout = false;
+	while (fgets(buffer, sizeof(buffer), file) != NULL) {
+		uint16_t length = strlen(buffer);
+		if (breakout) break;
+		for (uint16_t i = 0; i < length; i++) {
+			if (buffer[i] == '(') { 
+				floor++; 
+				pos++; 
+			}
+			else if (buffer[i] == ')') { 
+				floor--; 
+				pos++; 
+			}
+
+			if (floor == -1) { 
+				breakout = true; 
+				break; 
+			}
+		}
+	}
+	if (ferror(file)) {
+		perror("Error reading form file.");
+		return 1;
+	}
+	fclose(file);
+
+	printf("position: %i\n", pos);
+
+	return 0;
+}
+

2015/day01/makefile

@@ -0,0 +1,10 @@
+CC = gcc
+CFLAGS = -std=c99 -Wall -g
+LDFLAGS =
+
+answer01: answer01.c
+	$(CC) answer01.c -o answer01
+
+answer02: answer02.c
+	$(CC) answer02.c -o answer02
+