Compilare: user.cpp: In function ‘int main()’: user.cpp:25:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( poz < a [ i ] . x) ^ user.cpp:16:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( "timbre.in" , "r" , stdin ) ; ^ user.cpp:17:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( "timbre.out" , "w" , stdout ) ; ^ user.cpp:18:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%ld %ld %ld" , & n , & m , & k ) ; ^ user.cpp:20:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%ld %ld" , & a [ i ] . x , & a [ i ] . y ) ; ^