C++에서 벡터를 복사하는 방법에는 여러 가지가 있습니다.
1) 표준::복사
std::copy는 한 벡터에서 다른 벡터로 요소를 복사하기 위해 내장되어 있습니다.
구문
std::copy(first_iterator_o, last_iterator_o, back_inserter()): first_iteratot_0 = First iterator of first vector. last_iteratot_0 = Last iterator of first vector. back_inserter() = To insert values from back.
알고리즘
Begin Declare v1 of vector type. Initialize some values into v1 vector in array pattern. Declare v2 of vector type. Call copy(v1.begin(), v1.end(), back_inserter(v2)) to copy all elements of v1 to v2. Print “v1 vector elements are :”. for (int i=0;i<1.size; i++) print the all element of v2 vector. Print “v2 vector elements are :”. for (int i=0;i<2.size; i++) print the all element of v2 vector. End.
예시 코드
#include<iostream>
#include<vector>
#include<algorithm> // for copy.
#include<iterator> // for back_inserter
using namespace std;
int main() {
vector<int> v1{ 7, 6, 4, 5 };
vector<int> v2;
copy(v1.begin(), v1.end(), back_inserter(v2));
cout << "v1 vector elements are : ";
for (int i=0; i<v1.size(); i++)
cout << v1[i] << " ";
cout << endl;
cout << "v2 vector elements are : ";
for (int i=0; i<v2.size(); i++)
cout << v2[i] << " ";
cout<< endl;
return 0;
} 출력
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
2) 연산자 할당
이것은 벡터 1에서 벡터 2로 값을 복사하는 데에도 사용됩니다.
구문
std::assign(first_iterator_o, last_iterator_o): first_iteratot_0 = First iterator of first vector. last_iteratot_0 = Last iterator of first vector.
알고리즘
Begin Initialize a vector v1 with its elements. Declare another vector v2. Call assign() to copy the elements of v1 to v2. Print the elements of v1. Print the elements of v2. End.
예시 코드
#include<iostream> #include<vector> // for vector #include<iostream>
#include<vector>// for vector
#include<algorithm>// for copy() and assign()
#include<iterator>// for back_inserter
using namespace std;
int main() {
vector<int> v1{7,6,4,5};
vector<int> v2;
v2.assign(v1.begin(), v1.end());
cout << "v1 vector elements are : ";
for (int i=0; i<v1.size(); i++)
cout << v1[i] << " ";
cout << endl;
cout << "v2 vector elements are : ";
for (int i=0; i<v2.size(); i++)
cout << v2[i] << " ";
cout<< endl;
return 0;
} 출력
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
3) 할당 "=" 연산자에 의해
벡터 1에서 벡터 2로 값을 복사하는 간단한 방법입니다.
알고리즘
Begin Initialize a vector v1 with its elements. Declare another vector v2. Call assignment operator “=” to copy the elements of v1 to v2. Print the elements of v1. Print the elements of v2. End.
예시 코드
#include<iostream>
#include<vector> // for vector
#include<algorithm>// for copy() and assign()
#include<iterator>// for back_inserter
using namespace std;
int main() {
vector<int> v1{7,6,4,5};
vector<int> v2;
v2 = v1 ;
cout << "v1 vector elements are : ";
for (int i=0; i<v1.size(); i++)
cout << v1[i] << " ";
cout << endl;
cout << "v2 vector elements are : ";
for (int i=0; i<v2.size(); i++)
cout << v2[i] << " ";
cout<< endl;
return 0;
} 출력
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
4) push_back 방식으로
알고리즘
Begin Initialize a vector v1 with its elements. Declare another vector v2. Make a for loop to copy elements of first vector into second vector by Iterative method using push_back(). Print the elements of v1. Print the elements of v2. End.
예시 코드
#include<iostream> #include<vector> // for vector
#include<iostream>
#include<vector>// for vector
#include<algorithm>// for copy() and assign()
#include<iterator>// for back_inserter
using namespace std;
int main() {
vector<int> v1{7,6,4,5};
vector<int> v2;
for (int i=0; i<v1.size(); i++)
v2.push_back(v1[i]);
cout << "v1 vector elements are : ";
for (int i=0; i<v1.size(); i++)
cout << v1[i] << " ";
cout << endl;
cout << "v2 vector elements are : ";
for (int i=0; i<v2.size(); i++)
cout << v2[i] << " ";
cout<< endl;
return 0;
} 출력
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
5) 벡터를 생성자로 전달하여
알고리즘
Begin Initialize a vector v1 with its elements. Declare another vector v2 and copying elements of first vector to second vector using constructor method and they are deeply copied. Print the elements of v1. Print the elements of v2. End.
예시 코드
#include<iostream>
#include<vector>// for vector
#include<algorithm>// for copy() and assign()
#include<iterator>// for back_inserter
using namespace std;
int main() {
vector<int> v1{7,6,4,5};
vector<int> v2(v1);
cout << "v1 vector elements are : ";
for (int i=0; i<v1.size(); i++)
cout << v1[i] << " ";
cout << endl;
cout << "v2 vector elements are : ";
for (int i=0; i<v2.size(); i++)
cout << v2[i] << " ";
cout<< endl;
return 0;
} 출력
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5