STL에서 벡터를 구현하는 C++ 프로그램

벡터는 요소가 삽입되거나 삭제될 때 동적 배열처럼 자동으로 크기를 조정할 수 있는 기능이 있으며 컨테이너는 자동으로 저장을 처리합니다. 벡터 요소는 반복자를 사용하여 액세스하고 탐색할 수 있도록 연속 스토리지에 배치됩니다. 벡터의 시작, 중간 또는 끝에서 데이터를 삽입하거나 삭제할 수 있습니다.

기능 및 설명:

List of functions used here:
   v.size() = Returns the size of vector.
   v.push_back() = It is used to insert elements to the vector from end.
   v.pop_back() = To pop out the value from the vector from back.
   v.capacity() = Returns the size of the storage space currently allocated to the vector as number of elements.
   v.clear() = Clears the vector.

예시 코드

#include <iostream>
#include <vector>
using namespace std;
int main() {
   vector<int> v;
   vector<int>::iterator it;
   int c, i;
   while (1) {
      cout<<"1.Size of the Vector"<<endl;
      cout<<"2.Insert Element into the Vector"<<endl;
      cout<<"3.Delete Last Element of the Vector"<<endl;
      cout<<"4.Display the capacity of vector"<<endl;
      cout<<"5.Display by Iterator"<<endl;
      cout<<"6.Clear the Vector"<<endl;
      cout<<"7.Exit"<<endl;
      cout<<"Enter your Choice: ";
      cin>>c;
      switch(c) {
         case 1:
            cout<<"Size of Vector: ";
            cout<<v.size()<<endl;
         break;
         case 2:
            cout<<"Enter value to be inserted: ";
            cin>>i;
            v.push_back(i);
         break;
         case 3:
            cout<<"Delete Last Element Inserted:"<<endl;
            v.pop_back();
         break;
         case 4:
            cout<<"Displaying capacity of vector: ";
            cout<<v.capacity()<<endl;
         break;
         case 5:
            cout<<"Displaying Vector by Iterator: ";
            for (it = v.begin(); it != v.end(); it++) {
               cout<<*it<<" ";
            }
            cout<<endl;
         break;
         case 6:
            v.clear();
            cout<<"Vector Cleared"<<endl;
         break;
         case 7:
            exit(1);
         break;
         default:
            cout<<"Wrong Choice"<<endl;
      }
   }
   return 0;
}

출력

1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 1
Size of Vector: 0
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 2
Enter value to be inserted: 7
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 2
Enter value to be inserted: 6
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 2
Enter value to be inserted: 4
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 2
Enter value to be inserted: 3
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 2
Enter value to be inserted: 5
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 4
Displaying capacity of vector: 8
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 5
Displaying Vector by Iterator: 7 6 4 3 5
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 3
Delete Last Element Inserted:
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 5
Displaying Vector by Iterator: 7 6 4 3
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 6
Vector Cleared
1.Size of the Vector
2.Insert Element into the Vector
3.Delete Last Element of the Vector
4.Display the capacity of vector
5.Display by Iterator
6.Clear the Vector
7.Exit
Enter your Choice: 7
Exit.