Compilare: user.cpp: In function ‘int back(int, int, int)’: user.cpp:11:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,sum; ^ user.cpp: In function ‘int callim(int)’: user.cpp:38:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,lim; ^ user.cpp: In function ‘int pal(int)’: user.cpp:57:25: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int nm,a[10],i,l,nt,ok; ^ user.cpp:77:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:80:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k; ^ user.cpp: In function ‘int back(int, int, int)’: user.cpp:35:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int callim(int)’: user.cpp:52:24: warning: ‘lim’ may be used uninitialized in this function [-Wmaybe-uninitialized] return back(y,lim,1) ^