Compilare: user.cpp: In function ‘void ThirdPrecompute()’: user.cpp:169:35: warning: unused variable ‘angle’ [-Wunused-variable] double a,b,c,a0,b0,c0,up,down,angle; ^ user.cpp: In function ‘int main()’: user.cpp:216:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("jb.in","r",stdin); ^ user.cpp:217:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("jb.out","w",stdout); ^ user.cpp:219:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:221:107: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf%d",&planets[i].location.x,&planets[i].location.y,&planets[i].r,&planets[i].bases); ^ user.cpp:223:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",&planets[i].base[j].x,&planets[i].base[j].y); ^