提出 569e6e16-4cba-4972-9a31-c931ead7420d

コード

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

int main() {
    using namespace std;
int Q,T,X;
cin>>Q;
vector<int> vec();
for (int i = 0; i < Q; i++) {
    cin>>T;
  if (T=1) {cin>>X;
    vec.vector(X);
  
}
else if (T=2) { cout << vec.at(1) << endl;
  
  vec.pop_back(1); 
}
else {
  cout << vec.size() << endl;
  
}

 
}
}

結果

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

コンパイルエラー

Main.cpp: In function 'int main()':
Main.cpp:8:16: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    8 | vector<int> vec();
      |                ^~
Main.cpp:8:16: note: remove parentheses to default-initialize a variable
    8 | vector<int> vec();
      |                ^~
      |                --
Main.cpp:12:9: error: request for member 'vector' in 'vec', which is of non-class type 'std::vector<int>()'
   12 |     vec.vector(X);
      |         ^~~~~~
Main.cpp:15:29: error: request for member 'at' in 'vec', which is of non-class type 'std::vector<int>()'
   15 | else if (T=2) { cout << vec.at(1) << endl;
      |                             ^~
Main.cpp:17:7: error: request for member 'pop_back' in 'vec', which is of non-class type 'std::vector<int>()'
   17 |   vec.pop_back(1);
      |       ^~~~~~~~
Main.cpp:20:15: error: request for member 'size' in 'vec', which is of non-class type 'std::vector<int>()'
   20 |   cout << vec.size() << endl;
      |               ^~~~