Eroare de compilare: user.cpp: In function ‘void backy(int)’: user.cpp:8:8: error: ‘ok’ was not declared in this scope if(ok) return; ^~ user.cpp:11:9: error: ‘ok’ was not declared in this scope ok=1; ^~ user.cpp:17:1: error: expected primary-expression before ‘}’ token } ^ user.cpp: In function ‘int main()’: user.cpp:24:33: error: ‘v’ was not declared in this scope for(int i=0;i<4;++i) f>>v[i]; ^ user.cpp:25:9: error: ‘ok’ was not declared in this scope ok=0; ^~