Compilare: main.cpp: In function 'int main()': main.cpp:48:33: warning: format '%lf' expects argument of type 'double*', but argument 2 has type 'long double*' [-Wformat=] scanf("%lf%lf" , &x , &y); ^ main.cpp:48:33: warning: format '%lf' expects argument of type 'double*', but argument 3 has type 'long double*' [-Wformat=] main.cpp:61:30: warning: format '%lf' expects argument of type 'double', but argument 2 has type 'long double' [-Wformat=] printf("%.2lf" , arie(st)); ^ main.cpp:41:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in" , "r" , stdin); ^ main.cpp:42:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out" , "w" , stdout); ^ main.cpp:45:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &n); ^ main.cpp:48:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf" , &x , &y); ^