Compilare: user.cpp: In function ‘void citire()’: user.cpp:41:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta5.in","r",stdin); ^ user.cpp:42:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&test); ^ user.cpp:43:31: 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:45:70: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {scanf("%d %d %d %d",&bu[i].x1,&bu[i].y1,&bu[i].x2,&bu[i].y2); ^ user.cpp: In function ‘int emptyup(int)’: user.cpp:68:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int emptydown(int)’: user.cpp:75:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int emptyleft(int)’: user.cpp:101:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int emptyright(int)’: user.cpp:112:1: warning: control reaches end of non-void function [-Wreturn-type] } ^