Compilare: user.cpp: In function ‘int main()’: user.cpp:15:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, k, l,ok1=0,ok2=0,ok3=0, z=0,x=0, z1=0,x1=0; ^ user.cpp:15:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, k, l,ok1=0,ok2=0,ok3=0, z=0,x=0, z1=0,x1=0; ^ user.cpp:15:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, l,ok1=0,ok2=0,ok3=0, z=0,x=0, z1=0,x1=0; ^ user.cpp:15:18: warning: unused variable ‘l’ [-Wunused-variable] int i, j, k, l,ok1=0,ok2=0,ok3=0, z=0,x=0, z1=0,x1=0; ^ user.cpp:15:26: warning: unused variable ‘ok2’ [-Wunused-variable] int i, j, k, l,ok1=0,ok2=0,ok3=0, z=0,x=0, z1=0,x1=0; ^ user.cpp:15:32: warning: unused variable ‘ok3’ [-Wunused-variable] int i, j, k, l,ok1=0,ok2=0,ok3=0, z=0,x=0, z1=0,x1=0; ^ user.cpp:16:9: warning: unused variable ‘T’ [-Wunused-variable] int T=3; ^