Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int n,m,a,s,i,j; ^ user.cpp:9:19: warning: unused variable ‘j’ [-Wunused-variable] int n,m,a,s,i,j; ^ user.cpp:12:12: warning: ‘i’ is used uninitialized in this function [-Wuninitialized] a=n;m=i; ^