Compilare: user.cpp: In function ‘int main()’: user.cpp:7:15: warning: unused variable ‘ok’ [-Wunused-variable] int n,i,k,ok=1,oo=0,c; ^ user.cpp:7:20: warning: unused variable ‘oo’ [-Wunused-variable] int n,i,k,ok=1,oo=0,c; ^ user.cpp:7:25: warning: unused variable ‘c’ [-Wunused-variable] int n,i,k,ok=1,oo=0,c; ^ user.cpp:20:11: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<k; ^