Compilare: user.cpp: In function ‘int main()’: user.cpp:19:13: warning: unused variable ‘k’ [-Wunused-variable] int a,b,k,nr,m,s1,s2; ^ user.cpp:19:15: warning: unused variable ‘nr’ [-Wunused-variable] int a,b,k,nr,m,s1,s2; ^ user.cpp:19:18: warning: unused variable ‘m’ [-Wunused-variable] int a,b,k,nr,m,s1,s2; ^ user.cpp:19:20: warning: unused variable ‘s1’ [-Wunused-variable] int a,b,k,nr,m,s1,s2; ^ user.cpp:19:23: warning: unused variable ‘s2’ [-Wunused-variable] int a,b,k,nr,m,s1,s2; ^