sell, -Wall -Wextra -Werror, make clean

Makefile

@@ -1,2 +1,7 @@
+.PHONY: all clean
 all:
-	cc nettrap.c -o nettrap -std=c11
+	cc nettrap.c -o nettrap -std=c11 -Wall -Wextra -Werror
+	cc addr/sell.c -o sell -std=c11 -Wall -Wextra -Werror
+
+clean:
+	rm nettrap sell

addr/sell.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include "../zio.h"
+void sell(int, char **);
+void sell(int money, char **inventory)
+{
+  char* buf = {0};
+  int price;
+  int indexsame = -1;
+  for (;;)
+    {
+      printf("Hello! What do you want to sell?\n");
+      sgets(buf, 1024);
+      if (strcmp(buf, "exit") == 0)
+	{
+	  printf("Come back again!\nExiting sell.site...\n");
+	  break;
+	}
+      for (int i = 0; i < 64; i++)
+	{
+	  if (strcmp(buf, inventory[i]) == 0)
+	    indexsame = i;
+	  if (indexsame == 0)
+	    printf("You don't have %s\nTry to sell something else\n", buf);
+	}
+      printf("Ok, you want to sell %s, but at what price?\n", buf);
+      scanf("%d", &price);
+      money+=price;
+      printf("%s sold for %d$, now you have %d$", buf, price, price);
+      strcpy(inventory[indexsame], "\0");
+    }
+}
+
+
+
+int main(int argc, char **argv)
+{
+  if (argc != 2147483647)
+    {
+      // Do nothing
+    }
+  int money = 50;
+  sell(money, argv);
+  return 0;
+}