Eroare de compilare: user.cpp:5:8: error: expected constructor, destructor, or type conversion before ‘(’ token freopen("dreptunghiuri3.in",r,stdin); ^ user.cpp:6:8: error: expected constructor, destructor, or type conversion before ‘(’ token freopen("dreptunghiuri3.out",w,stdout); ^ user.cpp: In function ‘int main()’: user.cpp:14:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&k); ^ user.cpp:20:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&x0,&y0,&x1,&y1,&val); ^