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,col=1,lin=1; ^ user.cpp:11:17: warning: unused variable ‘c’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:11:21: warning: unused variable ‘j’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:11:23: warning: unused variable ‘k’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:11:25: warning: unused variable ‘pi’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:11:28: warning: unused variable ‘pj’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^ user.cpp:11:31: warning: unused variable ‘r’ [-Wunused-variable] int n,m,a,b,c,i,j,k,pi,pj,r,col=1,lin=1; ^