View Compilation Error

0_0_23516350_29892.cpp: In function 'int main()':
0_0_23516350_29892.cpp:26:2: error: 'set' is not a member of 'std::ios {aka std::basic_ios<char>}'
  ios::set
  ^
0_0_23516350_29892.cpp:28:23: error: 'sync_with_stdio' was not declared in this scope
  sync_with_stdio(false);
                       ^
0_0_23516350_29892.cpp:29:16: error: 'A' was not declared in this scope
  while (cin >> A >> B >> n && A && B && n){
                ^
0_0_23516350_29892.cpp:29:21: error: 'B' was not declared in this scope
  while (cin >> A >> B >> n && A && B && n){
                     ^
0_0_23516350_29892.cpp:29:26: error: 'n' was not declared in this scope
  while (cin >> A >> B >> n && A && B && n){
                          ^