Compilare: user.cpp: In function ‘int main()’: user.cpp:16:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "figuri2.in", "r", stdin ); ^ user.cpp:17:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "figuri2.out", "w", stdout ); ^ user.cpp:20:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d\n", &n ); ^ user.cpp:33:25: warning: ‘np’ may be used uninitialized in this function [-Wmaybe-uninitialized] np++; ^