Compilare: user.cpp: In function ‘void Insert(int, int, int, int)’: user.cpp:22:9: warning: unused variable ‘line’ [-Wunused-variable] int line=x1,col=y1; ^ user.cpp:22:17: warning: unused variable ‘col’ [-Wunused-variable] int line=x1,col=y1; ^ user.cpp: In function ‘void Read()’: user.cpp:30:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp:30:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void precalcLine()’: user.cpp:64:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^