提出 2a71a426-2bac-444d-9560-c4f917d0f41f

コード

  #include <bits/stdc++.h>
using namespace std;

int main()
{
    queue<int> S;
    int Q,X,T;
    cin>>Q;
    for(int i=0;i<Q;i++){
        cin>>T;

        if(T==1){cin>>X;
           S.push(X); 
}
        else if(T==2){ cin>>X;
        S.front(X); 
            
        }
        else if(T==3){ cout<<S.front()<<endl;
            S.pop();
        }
    }
}

結果

問題	点数	言語	結果	実行時間	メモリ
E - Q2	0	C++	WJ	0 ms	0 KiB

コンパイルエラー

Main.cpp: In function 'int main()':
Main.cpp:16:16: error: no matching function for call to 'std::queue<int>::front(int&)'
   16 |         S.front(X);
      |         ~~~~~~~^~~
In file included from /usr/include/c++/13/queue:66,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:157,
                 from Main.cpp:1:
/usr/include/c++/13/bits/stl_queue.h:233:7: note: candidate: 'std::queue<_Tp, _Sequence>::reference std::queue<_Tp, _Sequence>::front() [with _Tp = int; _Sequence = std::deque<int, std::allocator<int> >; reference = int&]'
  233 |       front()
      |       ^~~~~
/usr/include/c++/13/bits/stl_queue.h:233:7: note:   candidate expects 0 arguments, 1 provided
/usr/include/c++/13/bits/stl_queue.h:245:7: note: candidate: 'std::queue<_Tp, _Sequence>::const_reference std::queue<_Tp, _Sequence>::front() const [with _Tp = int; _Sequence = std::deque<int, std::allocator<int> >; const_reference = const int&]'
  245 |       front() const
      |       ^~~~~
/usr/include/c++/13/bits/stl_queue.h:245:7: note:   candidate expects 0 arguments, 1 provided