Compilare: user.cpp: In function ‘void Read()’: user.cpp:13:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.cpp: In function ‘void precalcArea()’: user.cpp:55:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void Solve()’: user.cpp:75:10: warning: ‘colour’ may be used uninitialized in this function [-Wmaybe-uninitialized] char colour; ^ user.cpp:113:19: warning: ‘col’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<line<<" "<<col<<" "<<colour<<"\n"; ^ user.cpp:113:8: warning: ‘line’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<line<<" "<<col<<" "<<colour<<"\n"; ^