Compilare: user.cpp: In function ‘int main()’: user.cpp:39:21: warning: unused variable ‘mn’ [-Wunused-variable] long double mn=1; ^ user.cpp:40:13: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int c=0; ^ user.cpp:47:8: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(j=a-nr-m+1,i=a-m+1;i<=a;i++,j++) ^