Use the C99 <stdbool.h> header file

src/globals.c

@@ -59,7 +59,7 @@ move_rec_t	game_move[NUMBER_MOVES];	// Current moves
 
 double	interest_rate;			// Current interest rate
 double	credit_limit;			// Credit limit of current player
-int	bid_used;			// True if bid used for player
+bool	bid_used;			// True if bid used for player
 
 int	max_turn;			// Max. number of turns in game
 int	turn_number;
@@ -67,5 +67,5 @@ int	current_player;
 int	number_players;
 int	first_player;			// Who WAS the first player to go?
 
-int	game_loaded;			// True if game was loaded from disk
+bool	game_loaded;			// True if game was loaded from disk
 char	*game_filename;			// Game file filename

src/globals.h

@@ -32,6 +32,9 @@
 #define included_GLOBALS_H 1
 
 
+#include <stdbool.h>
+
+
 /************************************************************************
 *                    Constants and type declarations                    *
 ************************************************************************/
@@ -78,7 +81,7 @@ typedef struct company_info {
     double	share_return;		// Return per share
     long	stock_issued;		// Total stock sold to players
     long	max_stock;		// Max. stock that company has
-    int		on_map;			// True if company on map
+    bool	on_map;			// True if company on map
 } company_info_t;
 
 
@@ -88,7 +91,7 @@ typedef struct player_info {
     double	cash;			// Cash available
     double	debt;			// Amount of debt
     long	stock_owned[MAX_COMPANIES];	// How much stock is owned
-    int		in_game;		// True if still in the game
+    bool	in_game;		// True if still in the game
 } player_info_t;
 
 
@@ -124,7 +127,7 @@ extern move_rec_t	game_move[NUMBER_MOVES];	// Current moves
 
 extern double	interest_rate;		// Current interest rate
 extern double	credit_limit;		// Credit limit of current player
-extern int	bid_used;		// True if bid used for player
+extern bool	bid_used;		// True if bid used for player
 
 extern int	max_turn;		// Max. number of turns in game
 extern int	turn_number;
@@ -132,7 +135,7 @@ extern int	current_player;
 extern int	number_players;
 extern int	first_player;		// Who WAS the first player to go?
 
-extern int	game_loaded;		// True if game was loaded from disk
+extern bool	game_loaded;		// True if game was loaded from disk
 extern char	*game_filename;		// Game file filename
 
 #endif /* included_GLOBALS_H */

src/system.h

@@ -49,6 +49,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <stdbool.h>
 #include <string.h>
 #include <locale.h>
 
@@ -78,15 +79,6 @@
 #endif
 
 
-// Boolean values
-#ifndef FALSE
-#  define FALSE (0)
-#endif
-#ifndef TRUE
-#  define TRUE (1)
-#endif
-
-
 // Compiler __attributes__ for less-capable compilers
 #ifndef HAVE___ATTRIBUTE__
 #  define __attribute__(x)

src/trader.c

@@ -63,7 +63,7 @@ int main (int argc, char *argv[])
     initscr();
     noecho();
     timeout(-1);
-    keypad(stdscr, TRUE);
+    keypad(stdscr, true);
     raw();
 
     printw(_("Program name:   %s\n"), program_name());
@@ -127,8 +127,8 @@ static void process_cmdline (int argc, char *argv[])
     int c;
 
     // Process arguments starting with "-" or "--"
-    opterr = TRUE;
-    while (TRUE) {
+    opterr = true;
+    while (true) {
 	c = getopt_long(argc, argv, options_short, options_long, NULL);
 	if (c == EOF)
 	    break;