Initial Commit - days 01-12

day03/ex1-c.c

@@ -0,0 +1,38 @@
+/* ex1-c: Advent2020 game, day 3/game 1
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define	XMOVE 3
+
+int my_strlen(str)
+     char *str;
+{
+     int i;
+     for (i=0; *str; ++i, ++str)
+          ;
+     return i;
+}
+
+
+int main(ac, av)
+     char **av;
+{
+
+     int col=0, line=0, linelen=0, mod=0, count=0;
+     char str[80];
+
+     scanf("%s", str);          /* ignore 1st line */
+
+     while (scanf("%s", str) != EOF) {
+          line++;
+          col+=XMOVE;
+          linelen=my_strlen(str);
+          mod=col%linelen;
+          if (*(str+mod) == '#')
+               count++;
+     }
+     printf ("%s : lines:%d pos:%d found:%d\n", *av, line, col, count);
+     exit (0);
+}