Compilare: user.cpp: In function ‘int main()’: user.cpp:58:17: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok=1; ^ user.cpp:13:15: warning: unused variable ‘b’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:13:17: warning: unused variable ‘c’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:13:21: warning: unused variable ‘j’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:13:23: warning: unused variable ‘k’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:13:25: warning: unused variable ‘pi’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:13:28: warning: unused variable ‘pj’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:13:31: warning: unused variable ‘r’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^