Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:16:20: error: ‘n’ was not declared in this scope for(int i=1;i<=n;++i) ^ user.cpp:23:7: error: ‘n’ was not declared in this scope V[n+1].A=V[1].A; ^ user.cpp:29:9: error: ‘ans’ was not declared in this scope ans += x - y; ^ user.cpp:31:45: error: ‘ans’ was not declared in this scope fo << setprecision(6) << fixed << 0.5 * ans << '\n'; ^