#define warn(x, f) printf("Warning: repeated flag `%c'%s\n", x, f ? "; previous one(s) ignored." : ".")
// Macro for max: good because longs, shorts, or pointers can be compared
#define warn(x, f) printf("Warning: repeated flag `%c'%s\n", x, f ? "; previous one(s) ignored." : ".")
// Macro for max: good because longs, shorts, or pointers can be compared