Compilare: user.cpp: In function ‘int main()’: user.cpp:13:40: 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:14:42: 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:17:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d\n", &n ); ^ user.cpp:22:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "\n" ); ^ user.cpp:42:25: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr++; ^ user.cpp:30:25: warning: ‘np’ may be used uninitialized in this function [-Wmaybe-uninitialized] np++; ^