Compilare: user.cpp: In function ‘bool ver(int)’: user.cpp:40:18: warning: unused variable ‘i’ [-Wunused-variable] register int i,j,p,u,dr,iv,jv; ^ user.cpp:40:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,p,u,dr,iv,jv; ^ user.cpp: In function ‘int main()’: user.cpp:62:18: warning: unused variable ‘i’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:62:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:62:22: warning: unused variable ‘x’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:62:24: warning: unused variable ‘y’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:62:26: warning: unused variable ‘dr’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:62:29: warning: unused variable ‘iv’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:62:32: warning: unused variable ‘jv’ [-Wunused-variable] register int i,j,x,y,dr,iv,jv; ^ user.cpp:63:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.cpp:110:11: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<sol; ^