Compilare: user.cpp: In function ‘int inverse(int, int)’: user.cpp:32:15: warning: variable ‘d’ set but not used [-Wunused-but-set-variable] int x, y, d; ^ user.cpp: In function ‘int main(int, const char**)’: user.cpp:48:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "padure2.in" , "r", stdin ); ^ user.cpp:49:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "padure2.out", "w", stdout ); ^