adventofcode

commit: 038544a5c4ee25bce18281634fd6311fcd73631d
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sun,  1 Dec 2019 18:47:09 +0100

day1: new

Diffstat:
A
Makefile
7
+++++++
A
day1.c
36
++++++++++++++++++++++++++++++++++++

2 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,7 @@
+EXE = day1
+CFLAGS = -lm
+
+all: $(EXE)
+
+clean:
+	rm $(EXE)
diff --git a/day1.c b/day1.c
@@ -0,0 +1,36 @@
+#include <math.h> /* lround() */
+#include <fenv.h> /* fesetround(), FE_DOWNWARD */
+#include <assert.h> /* assert() */
+#include <stdio.h> /* printf() */
+#include <stdlib.h> /* atoi() */
+
+long int fuel_required(int mass) {
+	long int result;
+	fesetround(FE_DOWNWARD);
+
+	result = (lround(mass/3)-2);
+
+	printf("%ld\n", result);
+
+	return result;
+}
+
+int main(int argc, char *argv[]) {
+	char *line_mass = NULL;
+	size_t len = 0;
+	long int total = 0;
+
+	while(getline(&line_mass, &len, stdin) != -1) {
+		total += fuel_required(atoi(line_mass));
+	}
+
+	printf("\nTotal: %ld\n", total);
+
+	/*
+	* for(i;i<argc;i++) {
+	* 	fuel_required(atoi(argv[i]));
+	* }
+	*/
+
+	return 0;
+}