Compilare: user.cpp: In function ‘int main()’: user.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(n);i++) ^ user.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(n);i++) ^ user.cpp:11:33: warning: unused variable ‘j’ [-Wunused-variable] int nr_val[10],nr_car[10],i,j,v,s,pos,x; ^ user.cpp:11:39: warning: unused variable ‘pos’ [-Wunused-variable] int nr_val[10],nr_car[10],i,j,v,s,pos,x; ^ user.cpp:11:43: warning: unused variable ‘x’ [-Wunused-variable] int nr_val[10],nr_car[10],i,j,v,s,pos,x; ^