commit 808cdc3ce6e41aa17cd4e11864b1014a84151097
parent 400f9eff0c93a10b16411abee556cecf358638f3
Author: bsandro <email@bsandro.tech>
Date: Fri, 1 Dec 2023 09:39:05 +0200
day 01 p1
Diffstat:
6 files changed, 1105 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+*.o
diff --git a/day01/Makefile b/day01/Makefile
@@ -0,0 +1,25 @@
+NAME=$(shell basename ${PWD})
+SRC=$(wildcard *.c)
+DEPS:=$(wildcard *.h)
+OBJ:=$(SRC:.c=.o)
+CFLAGS=-O0 -g -std=c11 -Werror -Wall -Wextra -I. -I../common
+LDFLAGS=-lc
+
+all: $(NAME)
+
+.PHONY: clean run
+
+clean:
+ rm -f $(OBJ) $(NAME)
+
+%.o : %.c $(DEPS)
+ @$(CC) $(CFLAGS) -c $< -o $@
+
+$(NAME): $(OBJ)
+ @$(CC) $(OBJ) -o $@ $(LDFLAGS)
+
+run: $(NAME)
+ @./$(NAME) input.txt
+
+test: $(NAME)
+ @./$(NAME) test.txt
diff --git a/day01/input.txt b/day01/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/day01/main.c b/day01/main.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+
+void puzzle(const char *filename, long long *res1, long long *res2);
+//void puzzle_test(const char *filename, long long *res1, long long *res2);
+
+int main(int argc, char *argv[]) {
+ printf("Advent of Code: day 01\n");
+ double time_start = clock();
+
+ if (argc <= 1) {
+ printf("Usage: %s inputfile.txt\n", argv[0]);
+ return -1;
+ }
+
+ const char *filename = argv[1];
+ long long counter1 = -1;
+ long long counter2 = -1;
+
+ puzzle(filename, &counter1, &counter2);
+
+ printf("Puzzle #1: %lld\n", counter1);
+ printf("Puzzle #2: %lld\n", counter2);
+
+ double elapsed = clock() - time_start;
+ printf("Elapsed: %f\n", elapsed / CLOCKS_PER_SEC);
+
+ return 0;
+}
diff --git a/day01/puzzle.c b/day01/puzzle.c
@@ -0,0 +1,45 @@
+#define _DEFAULT_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <assert.h>
+
+#define STR_LEN 1024
+
+void puzzle(const char *filename, long long *result1, long long *result2) {
+ FILE *infile = fopen(filename, "r");
+ if (infile == NULL) {
+ fprintf(stderr, "fopen() error: %s\n", strerror(errno));
+ return;
+ }
+
+ char buf[STR_LEN] = {0};
+ unsigned int line_num = 0;
+
+ *result1 = 0;
+
+ while (fgets(buf, STR_LEN, infile) != NULL) {
+ int len = strlen(buf);
+ int n1 = -1, n2 = -1;
+ for (int i=0; i < len; ++i) {
+ char b = buf[i];
+ if (b > 47 && b < 58) {
+ n2 = b-48;
+ if (n1==-1) n1=b-48;
+ }
+ }
+ int num = n1*10 + n2;
+ //printf("num:%d\n", num);
+ *result1 += num;
+ ++line_num;
+ bzero(buf, STR_LEN);
+ }
+
+ // mutiny! ignoring feof/ferror.
+ fclose(infile);
+
+ (void)result2;
+}
diff --git a/day01/test.txt b/day01/test.txt
@@ -0,0 +1,4 @@
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet
