Compilare: user.cpp: In function ‘int main()’: user.cpp:8:11: warning: ‘second’ may be used uninitialized in this function [-Wmaybe-uninitialized] #define y second ^ user.cpp:8:11: note: ‘second’ was declared here #define y second ^ user.cpp:19:16: note: in expansion of macro ‘y’ int lgm=-1,x,y; ^ user.cpp:36:16: warning: ‘first’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=x-lgm+1; i<=x; ++i) for(int j=y-lgm+1; j<=y; ++j) mt[i][j]='-'; ^