Compilare: user.cpp: In function ‘void read(int&)’: user.cpp:13:10: warning: unused variable ‘x’ [-Wunused-variable] {int x,j; ^ user.cpp: In function ‘int main()’: user.cpp:34:13: warning: unused variable ‘j’ [-Wunused-variable] int i,N,j,x,WR; ^ user.cpp:34:15: warning: unused variable ‘x’ [-Wunused-variable] int i,N,j,x,WR; ^ user.cpp:95:26: warning: ‘WR’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<"write("<<WR<<")"<<"\n"; ^