commit d195f90ecad9292e26c8bf2249b52606ad06b87e
Author: bsandro <[email protected]>
Date: Wed, 1 Dec 2021 15:37:43 +0000
Day 01, puzzle 1.
Diffstat:
3 files changed, 2062 insertions(+), 0 deletions(-)
diff --git a/day01/Makefile b/day01/Makefile
@@ -0,0 +1,23 @@
+NAME!=basename ${PWD}
+CC=cc
+SRC!=ls *.c
+DEPS!=find . -type f -name "*.h" -maxdepth 1
+OBJ:=${SRC:.c=.o}
+
+CFLAGS=-O0 -std=c99 -g -Werror -Wall -Wextra -I.
+
+all: ${NAME}
+
+.PHONY: clean run
+
+clean:
+ @rm -f ${OBJ} ${NAME}
+
+$(OBJ): ${SRC} ${DEPS}
+ @${CC} ${CFLAGS} -c $< -o $@
+
+${NAME}: ${OBJ}
+ @${CC} ${OBJ} -o $@ ${LDFLAGS}
+
+run: ${NAME}
+ @./${NAME} input.txt
diff --git a/day01/input.txt b/day01/input.txt
@@ -0,0 +1,2000 @@
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diff --git a/day01/main.c b/day01/main.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+
+int main(int argc, char *argv[]) {
+ printf("advent of code day 01\n");
+ if (argc <= 1) {
+ printf("Usage: %s inputfile.txt\n", argv[0]);
+ return 0;
+ }
+
+ FILE *infile = fopen(argv[1], "r");
+ if (infile == NULL) {
+ printf("fopen() error: %s\n", strerror(errno));
+ return -1;
+ }
+
+ char *buf = NULL;
+ size_t len = 0;
+ int prev_depth = -1;
+ int counter = 0;
+ while ((buf = fgetln(infile, &len)) != NULL) {
+ if (len == 0) {
+ break;
+ }
+ int depth = atoi(buf);
+ if (prev_depth > -1 && depth > prev_depth) {
+ ++counter;
+ }
+ prev_depth = depth;
+ }
+
+ printf("1: %d\n", counter);
+
+ fclose(infile);
+
+ return 0;
+}
