Compilare: user.cpp: In function ‘int main()’: user.cpp:20:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=strlen(sir)-1;i++) ^ user.cpp:11:20: warning: unused variable ‘nr’ [-Wunused-variable] int p,l,laux,i,nr,suma; ^ user.cpp:11:18: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] int p,l,laux,i,nr,suma; ^