固定長配列と、動的配列と、可変長配列 #include #include //可変長配列 using namespace std; const int PLAYER_NUM{ 10 }; class samp { int n_;//<-プライベート public: samp() :n_(0) {} samp(int _n):n_(_n){} ~samp(){} void SetN(int _n) { n_ = _n; } int GetN() { return(n_); } }; int main() { //int arr[PLAYER_NUM]{ 2,4,6,8,10,12,14,16,18,20 }; //int num; //cin >> num; //int *player; //player = new int[num]; //for (int i = 0; i < num; i++) // player[i] = i + 1; //cout << "固定長配列" << endl; //for (int i = 0; i < PLAYER_NUM; i++) // cout << arr[i] << " "; // //cout << endl; //cout << "動的配列取得" << endl; //for (int i = 0; i < num; i++) // cout << player[i] << " "; //delete[] player; //samp Samp[PLAYER_NUM]{ 2,4,6,8,10,12,14,16,18,20 }; //for (int i = 0; i < PLAYER_NUM; i++) // cout << Samp[i].GetN() << " "; ////オブジェクトの動的取得でオブジェクト数を決める！ //int num; //cin >> num; //int* initList = new int[num]; //for (int i = 0; i < num; i++) { // cout << i << "番目の値:"; // cin >> initList[i]; //} //samp* sampList = nullptr; //sampList = new samp[num]; //sampList[0]～sampList[num-1]までが生成される //for (int i = 0; i < num; i++) // sampList[i].SetN(initList[i]); //for (int i = 0; i < num; i++) // cout << sampList[i].GetN() << " "; vector sampList; int n = 0; while (true) { cout << "ただ今のsampListの長さ：" << sampList.size() << endl; cin >> n; if (n != -1) { samp* p = new samp(n); sampList.push_back(p); } else break; } //sampListの中身のsmapのn_を全部表示 for (auto theI : sampList) { cout << theI->GetN() << " "; } for (auto theI : sampList) delete theI; cout << "ただ今のsampListの長さ：" << sampList.size() << endl; sampList.clear(); cout << "ただ今のsampListの長さ：" << sampList.size() << endl; return 0; } === 今日やったソースコードの最後の姿 === 配列を関数に引数で渡す #include #include //可変長配列 using namespace std; const int PLAYER_NUM{ 10 }; class samp { int n_;//<-プライベート public: samp() :n_(0) {} samp(int _n):n_(_n){} ~samp(){} void SetN(int _n) { n_ = _n; } int GetN() { return(n_); } }; //配列は関数には引数として渡せない！ //（固定長）配列を関数に渡す void PrintArray(int* p, int _num)//p:配列の先頭アドレス、_numは配列数 { for (int i = 0; i < _num; i++) cout << p[i] << " "; //cout << *(p + i) << endl; cout << endl; } void PrintArray(samp *_samp, int _num) { for (int i = 0; i < _num; i++) cout << _samp[i].GetN() << " "; //cout << *(_samp + i) << endl; cout << endl; } //固定長配列と、動的配列で2つの関数を読んで、表示させてみる。 void PrintArray(vector& _samplist) { for (auto& theI : _samplist)//for-each　C++では拡張for文　範囲for文 //for(int i = 0; i < _samplist.size(); i++) { cout << theI->GetN() << " "; } cout << endl; } int main() { int arr[PLAYER_NUM]{ 2,4,6,8,10,12,14,16,18,20 }; int num; cin >> num; int *player; player = new int[num]; for (int i = 0; i < num; i++) player[i] = i + 1; cout << "固定長配列" << endl; // for (int i = 0; i < PLAYER_NUM; i++) // cout << arr[i] << " "; PrintArray(arr, PLAYER_NUM); //配列の先頭アドレス＝配列名 // // cout << endl; cout << "動的配列取得" << endl; // for (int i = 0; i < num; i++) // cout << player[i] << " "; PrintArray(player, num); delete[] player; samp Samp[PLAYER_NUM]{ 2,4,6,8,10,12,14,16,18,20 }; // for (int i = 0; i < PLAYER_NUM; i++) // cout << Samp[i].GetN() << " "; cout << "固定長オブジェクト配列" << endl; //クラスの、インスタンスの、固定長配列 PrintArray(Samp, PLAYER_NUM); //オブジェクトの動的取得でオブジェクト数を決める！ //int num; cin >> num; int* initList = new int[num]; for (int i = 0; i < num; i++) { cout << i << "番目の値:"; cin >> initList[i]; } samp* sampList = nullptr; sampList = new samp[num]; //sampList[0]～sampList[num-1]までが生成される for (int i = 0; i < num; i++) sampList[i].SetN(initList[i]); PrintArray(sampList, num); //// for (int i = 0; i < num; i++) //// cout << sampList[i].GetN() << " "; // // vector sampList2; int n = 0; while (true) { cout << "ただ今のsampListの長さ：" << sampList2.size() << endl; cin >> n; if (n != -1) { samp* p = new samp(n); sampList2.push_back(p); } else break; } //sampListの中身のsmapのn_を全部表示 //for (auto theI : sampList2) //{ // cout << theI->GetN() << " "; //} PrintArray(sampList2); for (auto theI : sampList2) delete theI; cout << "ただ今のsampListの長さ：" << sampList2.size() << endl; sampList2.clear(); cout << "ただ今のsampListの長さ：" << sampList2.size() << endl; return 0; }