Compilare: user.cpp: In function ‘int main()’: user.cpp:14:17: warning: unused variable ‘l’ [-Wunused-variable] int k,val,n,l,i,semn=1,a=0,S,st=0,dr=-1,x,y; ^ user.cpp:44:20: warning: ‘val’ is used uninitialized in this function [-Wuninitialized] v[n++]=val*semn; ^ user.cpp:66:26: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<x + 1<<" "<<y + 1<<" "<<a; ^ user.cpp:66:14: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<x + 1<<" "<<y + 1<<" "<<a; ^