Compilare: user.cpp: In function ‘int main()’: user.cpp:11:15: warning: unused variable ‘b’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r; ^ user.cpp:11:17: warning: unused variable ‘c’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r; ^ user.cpp:11:23: warning: unused variable ‘k’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r; ^ user.cpp:11:31: warning: unused variable ‘r’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r; ^ user.cpp:11:28: warning: ‘pj’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m,a,b,c,i,j,k,pi,pj,r; ^ user.cpp:11:25: warning: ‘pi’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m,a,b,c,i,j,k,pi,pj,r; ^