Compilare: user.cpp: In function ‘int main()’: user.cpp:68:26: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] printf("%.2llf\n",eff); ^ user.cpp: In function ‘void Read()’: user.cpp:9:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&H,&n,&m,&p); ^ user.cpp: In function ‘int main()’: user.cpp:64:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scara2.in","r",stdin); ^ user.cpp:65:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scara2.out","w",stdout); ^