Eroare de compilare: user.cpp: In function ‘void df()’: user.cpp:30:7: warning: unused variable ‘cifre’ [-Wunused-variable] int cifre[14]; ^ user.cpp: In function ‘int main()’: user.cpp:127:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < solution.size(); ++i) { ^ user.cpp:130:5: error: expected initializer before ‘for’ for (j = solution[i], k = 1; j; j /= 2, ++k) { ^ user.cpp:130:35: warning: statement has no effect [-Wunused-value] for (j = solution[i], k = 1; j; j /= 2, ++k) { ^ user.cpp:130:47: error: ‘k’ was not declared in this scope for (j = solution[i], k = 1; j; j /= 2, ++k) { ^ user.cpp:130:48: error: expected ‘;’ before ‘)’ token for (j = solution[i], k = 1; j; j /= 2, ++k) { ^ user.cpp:144:1: error: expected ‘}’ at end of input } ^ user.cpp:126:8: warning: unused variable ‘first_printed’ [-Wunused-variable] bool first_printed = true; ^ user.cpp:144:1: error: expected ‘}’ at end of input } ^