Compilare: user.cpp: In function ‘void lfdr()’: user.cpp:101:28: warning: unused variable ‘yy’ [-Wunused-variable] int y=min(t.y,s[i].y), yy=max(t.y,s[i].y); ^ user.cpp: In function ‘void prc()’: user.cpp:110:28: warning: unused variable ‘yy’ [-Wunused-variable] int y=min(t.y,s[i].y), yy=max(t.y,s[i].y); ^ user.cpp: In function ‘void sec()’: user.cpp:121:9: warning: unused variable ‘y’ [-Wunused-variable] int y=min(t.y,s[i].y), yy=max(t.y,s[i].y); ^ user.cpp: In function ‘void cit()’: user.cpp:19:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ai.in","r",stdin); ^ user.cpp:20:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("ai.out","w",stdout); ^ user.cpp:22:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&n); ^ user.cpp:24:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&t.x,&t.y,&s[1].x,&s[1].y,&s[2].x); ^ user.cpp:25:64: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&s[2].y,&r[1].x,&r[1].y,&r[2].x,&r[2].y); ^ user.cpp:27:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&k); ^ user.cpp: In function ‘int main()’: user.cpp:153:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&ob[i].x,&ob[i].y); ^