Compilare: user.cpp: In function ‘int main()’: user.cpp:21:14: warning: unused variable ‘cont’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:21:36: warning: unused variable ‘x’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:21:38: warning: unused variable ‘y’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:21:40: warning: unused variable ‘p’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:21:44: warning: unused variable ‘u’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:21:48: warning: unused variable ‘x1’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:21:51: warning: unused variable ‘y1’ [-Wunused-variable] {int i,j,n,m,cont,r=0,g=0,b=0,mini,x,y,p=0,u=0,x1,y1; ^ user.cpp:47:5: warning: variable ‘dl’ set but not used [-Wunused-but-set-variable] int dl[4],dc[4]; ^ user.cpp:47:11: warning: variable ‘dc’ set but not used [-Wunused-but-set-variable] int dl[4],dc[4]; ^ user.cpp:60:30: warning: ‘mini’ is used uninitialized in this function [-Wuninitialized] out<<r<<" "<<g<<" "<<b<<" "<<mini<<'\n'; ^