结构向量 push_back C++

Question

我在弄清楚如何使用 push_back 函数将结构的数组元素推入 TeamV 向量时遇到问题。

这是我目前的代码：

const int MEMBERS = 3;
const int TEAM_NUM = 4;

struct TeamS
{
   int ID_NUM;
   string team_members;
};


int main()
{
   int arrayS = 0;
   const int ID[TEAM_NUM] = { 123, 321, 456, 789 };
   const string TEAM [TEAM_NUM][MEMBERS] =
   {
      { "Sarah", "Joe", "John" }, 
      { "Chris", "Kevin", "James" }, 
      { "Tom", "Kim", "Emily" }, 
      { "Jill", "Jason", "Jim" }
   };
   vector <TeamS> TeamV;
   Initialize(TeamV, ID, TEAM, arrayS);

   return 0;
}



void Initialize(vector <TeamS> & TeamV, const int Id[], const string m[][MEMBERS], int arraysize)
{
   cout << "Starting initialization" << endl;
   for (arraysize; arraysize < TEAM_NUM; arraysize++)
   {
      TeamV.push_back(???)
         TeamV [arraysize].ID_NUM = Id[arraysize];
      TeamV [arraysize].team_members = m[arraysize][MEMBERS];

   }
   cout << "Ending initialization" << endl;
}

提前致谢。

Answer 1

首先，您需要将 TeamS 更改为包含 string 团队成员的列表，而不仅仅是一个 string.
```
struct TeamS
{
   int ID_NUM;
   std::vector<string> team_members;
};
```

在函数中初始化teamV:

void Initialize(vector <TeamS> & TeamV, const int Id[], const string m[][MEMBERS], int arraysize)
{
   cout << "Starting initialization" << endl;
   for (arraysize; arraysize < TEAM_NUM; arraysize++)
   {
      // Create an instance of TeamS and flesh out its contents.
      TeamS team;
      team.ID_NUM = Id[arraysize];
      for ( int i = 0; i < MEMBERS; ++i )
      {
         team.team_members.push_back(m[arraysize][i]);
      }

      // Now add the TeamS to TeamV.
      TeamV.push_back(team);
   }
   cout << "Ending initialization" << endl;
}

您可以采取稍微不同的方法，即向 TeamV 添加一个空的 TeamS 并充实 TeamV.

中已有成员的内容

void Initialize(vector <TeamS> & TeamV, const int Id[], const string m[][MEMBERS], int arraysize)
{
   cout << "Starting initialization" << endl;
   for (arraysize; arraysize < TEAM_NUM; arraysize++)
   {
      // Add an tempy TeamS to TeamV.
      TeamS team;
      TeamV.push_back(team);

      // Flesh out its contents of the element in TeamV.
      TeamV[arraysize].ID_NUM = Id[arraysize];
      for ( int i = 0; i < MEMBERS; ++i )
      {
         TeamV[arraysize].team_members.push_back(m[arraysize][i]);
      }
   }
   cout << "Ending initialization" << endl;
}

结构向量 push_back C++

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