Compilare: user.cpp: In function ‘int main()’: user.cpp:51:13: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(v[j]==0) ^ user.cpp:13:26: warning: unused variable ‘ok’ [-Wunused-variable] int i, x,c1=0,c2=0,j,ok=0,l=0,p1,p2 ; ^~ user.cpp:13:35: warning: unused variable ‘p1’ [-Wunused-variable] int i, x,c1=0,c2=0,j,ok=0,l=0,p1,p2 ; ^~ user.cpp:13:38: warning: unused variable ‘p2’ [-Wunused-variable] int i, x,c1=0,c2=0,j,ok=0,l=0,p1,p2 ; ^~