Compilare: user.cpp: In function ‘int main()’: user.cpp:10:27: warning: unused variable ‘a’ [-Wunused-variable] int n,m,p,smax=0,c,i,j,a,b,k,u=0; ^ user.cpp:10:29: warning: unused variable ‘b’ [-Wunused-variable] int n,m,p,smax=0,c,i,j,a,b,k,u=0; ^ user.cpp:10:31: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m,p,smax=0,c,i,j,a,b,k,u=0; ^