Compilare: user.cpp: In function ‘int main()’: user.cpp:39:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:21: warning: unused variable ‘nr’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:26: warning: variable ‘up’ set but not used [-Wunused-but-set-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:29: warning: variable ‘pp’ set but not used [-Wunused-but-set-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:36: warning: unused variable ‘ue’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:39: warning: unused variable ‘uk’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:42: warning: unused variable ‘uee’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:39:46: warning: unused variable ‘ukk’ [-Wunused-variable] int i,j,k=0,dif,nr=1,up,pp,a,b,ue,uk,uee,ukk,pas=1,nu=0,nx1,ny1,nx2,ny2; ^ user.cpp:73:46: warning: ‘ny2’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<mat[nx1][ny1]<<" "<<mat[nx2][ny2]; ^ user.cpp:73:46: warning: ‘nx2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:73:26: warning: ‘ny1’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<mat[nx1][ny1]<<" "<<mat[nx2][ny2]; ^ user.cpp:73:26: warning: ‘nx1’ may be used uninitialized in this function [-Wmaybe-uninitialized]