Day 1

day1/Makefile

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+solution-part%: solution-part%.c
+	gcc $< -o $@
+
+test-%: solution-% example.txt
+	$< example.txt
+
+run-%: solution-% realinput.txt
+	$< realinput.txt
+
+.PHONY: $(patsubst %,run-%, 1 2) $(patsubst %,test-%, 1 2)

day1/example.txt

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+199
+200
+208
+210
+200
+207
+240
+269
+260
+263

day1/solution-part1.c

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+#include <stdio.h>
+
+int main( int argc, char *argv[] ){
+	if( argc == 2 ) {
+
+		unsigned int last = ~0;
+		unsigned int increasing = 0;
+		unsigned int value;
+
+		// Read the values into an array
+		FILE *fp=fopen(argv[1], "r");
+		while (!feof (fp)){
+			fscanf(fp, "%d\n", &value);
+
+			printf( "value %d\n", value );
+			if ( value > last )
+				increasing++;
+			last = value;
+		}
+		fclose(fp);
+
+
+		printf( "%d were increasing\n", increasing );
+
+		return 0;
+	} else {
+		printf("You need to provide a file\n");
+		return 1;
+	}
+}

day1/solution-part1.sh

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+#!/usr/bin/env bash
+
+# Give file as option 1
+
+file="$1"
+
+increasing=0
+last=99999999
+
+while read line; do
+	if [ "$line" -gt "$last" ]; then
+		increasing="$(( increasing + 1 ))"
+	fi
+	last="$line"
+done < <(cat "$file")
+
+echo "$increasing were increasing"

day1/solution-part2.c

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+#include <stdio.h>
+
+int countLines(char filename[]){
+	FILE *fp;
+	fp=fopen(filename, "r");
+	long int lines =0;
+
+	if ( fp == NULL ) {
+		return -1;
+	}
+
+	while (EOF != (fscanf(fp, "%*[^\n]"), fscanf(fp,"%*c")))
+		++lines;
+
+	fclose(fp); // closing file
+	return lines;
+}
+
+int main( int argc, char *argv[] ){
+	if( argc == 2 ) {
+		// 1 less because file ends with trailing new line
+		int lines=countLines(argv[1]);
+		int values[lines];
+		int line=0;
+		FILE *fp=fopen(argv[1], "r");
+		int increasing = 0;
+
+		// Read the values into an array
+		while (!feof (fp)){
+			fscanf(fp, "%d\n", &values[line]);
+
+
+			if ( (line >= 3) && (values[line] > values[line-3]) ){
+
+				increasing++;
+				
+			}
+
+
+			line++;
+		}
+		fclose(fp); // closing file
+
+
+
+		printf( "Increasing: %d\n", increasing );
+	
+
+		return 0;
+	} else {
+		printf("You need to provide a file\n");
+		return 1;
+	}
+}

day1/solution-part2.sh

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+#!/usr/bin/env bash
+
+# Give file as option 1
+
+file="$1"
+increasing=0
+
+readarray -t "arr" < "$file"
+
+length="${#arr[@]}"
+
+for i in $(seq 3 "$length"); do
+	curr="${arr[$i]}"
+	prev3="${arr[$((i - 3))]}"
+
+	if [ -n "$curr" ] && [ "$curr" -gt "$prev3" ]; then
+		increasing="$((increasing + 1))"
+	fi
+done
+
+echo "$increasing were increasing"
+