Compilare: user.cpp: In function ‘void rec(int, int, int, int, int)’: user.cpp:9:11: warning: unused variable ‘sum’ [-Wunused-variable] int j,sum; ^ user.cpp: In function ‘int main()’: user.cpp:34:13: warning: unused variable ‘ok’ [-Wunused-variable] int i,j,ok,nr,sum,op,k,kap; ^ user.cpp:34:16: warning: unused variable ‘nr’ [-Wunused-variable] int i,j,ok,nr,sum,op,k,kap; ^ user.cpp:34:19: warning: unused variable ‘sum’ [-Wunused-variable] int i,j,ok,nr,sum,op,k,kap; ^ user.cpp:34:23: warning: unused variable ‘op’ [-Wunused-variable] int i,j,ok,nr,sum,op,k,kap; ^ user.cpp:34:26: warning: unused variable ‘k’ [-Wunused-variable] int i,j,ok,nr,sum,op,k,kap; ^ user.cpp:34:28: warning: unused variable ‘kap’ [-Wunused-variable] int i,j,ok,nr,sum,op,k,kap; ^ user.cpp:44:9: warning: variable ‘inc’ set but not used [-Wunused-but-set-variable] int inc,sf; ^ user.cpp:44:13: warning: variable ‘sf’ set but not used [-Wunused-but-set-variable] int inc,sf; ^