Compilare: user.cpp: In function ‘int main()’: user.cpp:120:15: warning: unused variable ‘lk’ [-Wunused-variable] int nr1=0,lk,ck; ^ user.cpp:120:18: warning: unused variable ‘ck’ [-Wunused-variable] int nr1=0,lk,ck; ^ user.cpp:78:9: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<l-z+1<<"\n"; ^