Compilare: user.cpp: In function ‘int main()’: user.cpp:61:29: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘int’ [-Wformat=] scanf("%d %d",&pf.x,pf.y); ^ user.cpp:49:11: warning: unused variable ‘fin’ [-Wunused-variable] FILE *fin=freopen("alee.in","r",stdin); ^ user.cpp:50:11: warning: unused variable ‘fout’ [-Wunused-variable] FILE *fout=freopen("alee.out","w",stdout); ^ user.cpp:51:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&M); ^ user.cpp:56:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&p.x,&p.y); ^ user.cpp:60:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&pi.x,&pi.y); ^ user.cpp:61:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&pf.x,pf.y); ^