Compilare: user.cpp: In function ‘void read()’: user.cpp:21:37: warning: format ‘%i’ expects argument of type ‘int*’, but argument 2 has type ‘short int*’ [-Wformat=] scanf("%i%i",&p[i].x,&p[i].y); ^ user.cpp:21:37: warning: format ‘%i’ expects argument of type ‘int*’, but argument 3 has type ‘short int*’ [-Wformat=] user.cpp:16:9: warning: unused variable ‘a’ [-Wunused-variable] int a, b; ^ user.cpp:16:12: warning: unused variable ‘b’ [-Wunused-variable] int a, b; ^ user.cpp: In function ‘int connect(short int, short int)’: user.cpp:38:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[a].size(); i++) ^