Compilare: user.cpp: In function ‘int main()’: user.cpp:14:45: warning: format ‘%lf’ expects argument of type ‘double*’, but argument 2 has type ‘long double*’ [-Wformat=] scanf( "%lf %lf %lf %d", &A, &B, &C, &N ); ^ user.cpp:14:45: warning: format ‘%lf’ expects argument of type ‘double*’, but argument 3 has type ‘long double*’ [-Wformat=] user.cpp:14:45: warning: format ‘%lf’ expects argument of type ‘double*’, but argument 4 has type ‘long double*’ [-Wformat=] user.cpp:16:29: warning: format ‘%lf’ expects argument of type ‘double*’, but argument 2 has type ‘long double*’ [-Wformat=] scanf( "%lf", &V[i] ); ^ user.cpp:11:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "iopds.in" , "r", stdin ); ^ user.cpp:12:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "iopds.out", "w", stdout ); ^ user.cpp:14:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%lf %lf %lf %d", &A, &B, &C, &N ); ^ user.cpp:16:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%lf", &V[i] ); ^