Compilare: user.cpp: In function ‘void unionrooms()’: user.cpp:50:26: warning: unused variable ‘k’ [-Wunused-variable] int i,j,x,y,sol=0,sum,k,c1,c2,c3,c4; ^ user.cpp:96:17: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<x<<" "<<y<<" "<<sol; ^ user.cpp:96:9: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<x<<" "<<y<<" "<<sol; ^ user.cpp:94:43: warning: ‘c4’ may be used uninitialized in this function [-Wmaybe-uninitialized] tip[c1]=tip[c2]=tip[c3]=tip[c4]=0; ^ user.cpp:94:43: warning: ‘c3’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:94:43: warning: ‘c2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:94:43: warning: ‘c1’ may be used uninitialized in this function [-Wmaybe-uninitialized]