Compilare: user.cpp: In function ‘int main()’: user.cpp:33:6: warning: unused variable ‘a’ [-Wunused-variable] int a, b, puterea = (1<<30); ^ user.cpp:33:9: warning: unused variable ‘b’ [-Wunused-variable] int a, b, puterea = (1<<30); ^ user.cpp:33:12: warning: unused variable ‘puterea’ [-Wunused-variable] int a, b, puterea = (1<<30); ^