Compilare: user.cpp: In function ‘int main()’: user.cpp:27:14: warning: unused variable ‘kn1’ [-Wunused-variable] bool kn1=true; ^ user.cpp:28:25: warning: variable ‘cf’ set but not used [-Wunused-but-set-variable] int ls, cs, lf, cf; ^ user.cpp:13:31: warning: unused variable ‘v’ [-Wunused-variable] int m, n, a[105][105], k, v[42]; ^ user.cpp:22:15: warning: unused variable ‘n2’ [-Wunused-variable] int n1=0, n2=0; ^