Compilare: user.cpp: In function ‘int main()’: user.cpp:135:13: warning: unused variable ‘l1’ [-Wunused-variable] int i,j,l1,l2,d,lenx,leny; ^ user.cpp:135:16: warning: unused variable ‘l2’ [-Wunused-variable] int i,j,l1,l2,d,lenx,leny; ^ user.cpp:135:21: warning: unused variable ‘lenx’ [-Wunused-variable] int i,j,l1,l2,d,lenx,leny; ^ user.cpp:135:26: warning: unused variable ‘leny’ [-Wunused-variable] int i,j,l1,l2,d,lenx,leny; ^ user.cpp:136:11: warning: unused variable ‘x’ [-Wunused-variable] Point x[50],y[50]; ^ user.cpp:136:17: warning: unused variable ‘y’ [-Wunused-variable] Point x[50],y[50]; ^ user.cpp:137:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("volei.in","r",stdin); ^ user.cpp:138:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("volei.out","w",stdout); ^ user.cpp:139:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n,&d); ^ user.cpp:142:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d %c\n", &v[i].x,&v[i].y,&car[i]); ^