Compilare: user.cpp: In function ‘int main()’: user.cpp:9:29: warning: unused variable ‘k’ [-Wunused-variable] int a[101][101],m,n,i,j,k,dif,ok,x,r,lin,col,u=0,d=0; ^ user.cpp:9:35: warning: unused variable ‘ok’ [-Wunused-variable] int a[101][101],m,n,i,j,k,dif,ok,x,r,lin,col,u=0,d=0; ^ user.cpp:9:38: warning: unused variable ‘x’ [-Wunused-variable] int a[101][101],m,n,i,j,k,dif,ok,x,r,lin,col,u=0,d=0; ^ user.cpp:9:40: warning: unused variable ‘r’ [-Wunused-variable] int a[101][101],m,n,i,j,k,dif,ok,x,r,lin,col,u=0,d=0; ^