Compilare: user.cpp: In function ‘int win(int)’: user.cpp:98:48: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if ( bit( stare, i ) && !bit( stare, i - 1 ) ) ^ user.cpp:20:31: note: in definition of macro ‘bit’ #define bit(n,i) ( n & ( 1 << i ) ) ^ user.cpp: In function ‘char gen_game(int)’: user.cpp:117:48: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if ( bit( state, i ) && !bit( state, i - 1 ) ) ^ user.cpp:20:31: note: in definition of macro ‘bit’ #define bit(n,i) ( n & ( 1 << i ) ) ^ user.cpp: In function ‘int main()’: user.cpp:138:20: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FIN("coins.in"); ^ user.cpp:139:22: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] FOUT("coins.out"); ^