Compilare: user.cpp: In function ‘int main()’: user.cpp:25:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k,l,m,n,t[100]={0}; ^ user.cpp:25:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,l,m,n,t[100]={0}; ^ user.cpp:25:15: warning: unused variable ‘l’ [-Wunused-variable] int i,j,k,l,m,n,t[100]={0}; ^ user.cpp:25:17: warning: unused variable ‘m’ [-Wunused-variable] int i,j,k,l,m,n,t[100]={0}; ^