Compilare: user.cpp: In function ‘void read()’: user.cpp:24:9: warning: unused variable ‘x’ [-Wunused-variable] int x,i,j; ^ user.cpp: In function ‘void get_P2()’: user.cpp:84:25: warning: unused variable ‘dif’ [-Wunused-variable] int ap[2],pant = 0, dif = 0; ^ user.cpp: In function ‘void dynamic()’: user.cpp:130:9: warning: unused variable ‘v1’ [-Wunused-variable] int v1,v2,x; ^ user.cpp:130:12: warning: unused variable ‘v2’ [-Wunused-variable] int v1,v2,x; ^