运行 ID: 141770

Main.cc: In function ‘void push(char)’:
Main.cc:11:2: error: ‘s’ was not declared in this scope
  s[ans++] = t;
  ^
Main.cc: In function ‘int main()’:
Main.cc:26:21: error: ‘tot’ was not declared in this scope
  for(int i = 0; i < tot; i++) cout << s[i];
                     ^~~
Main.cc:26:39: error: ‘s’ was not declared in this scope
  for(int i = 0; i < tot; i++) cout << s[i];
                                       ^