Compilare: user.cpp: In function ‘int main()’: user.cpp:10:13: warning: unused variable ‘a’ [-Wunused-variable] int n,q,a,d,c=0,i,j,sem; ^ user.cpp:10:15: warning: unused variable ‘d’ [-Wunused-variable] int n,q,a,d,c=0,i,j,sem; ^ user.cpp:10:25: warning: unused variable ‘sem’ [-Wunused-variable] int n,q,a,d,c=0,i,j,sem; ^