Compilare: user.cpp: In function ‘void expo(long long int)’: user.cpp:42:18: warning: unused variable ‘j’ [-Wunused-variable] long long i, j; ^ user.cpp: In function ‘int main()’: user.cpp:53:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, temp, t1, t2, t3; ^ user.cpp:53:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, temp, t1, t2, t3; ^