C++ में वेक्टर कॉपी करने के विभिन्न तरीके हैं।
1) std::copy
std::copy एक वेक्टर से दूसरे वेक्टर में एलिमेंट्स कॉपी करने के लिए इनबिल्ट है।
सिंटैक्स
std::copy(first_iterator_o, last_iterator_o, back_inserter()): first_iteratot_0 = पहले वेक्टर का पहला इटरेटर। last_iteratot_0 = पहले वेक्टर का अंतिम इटरेटर। back_inserter() = पीछे से मान डालने के लिए।
एल्गोरिथम
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.
उदाहरण कोड
#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; }
आउटपुट
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
2) असाइन ऑपरेटर
इसका उपयोग वेक्टर 1 से वेक्टर 2 में मान कॉपी करने के लिए भी किया जाता है।
सिंटैक्स
std::assign(first_iterator_o, last_iterator_o): first_iteratot_0 = पहले वेक्टर का पहला इटरेटर। last_iteratot_0 = पहले वेक्टर का अंतिम इटरेटर।
एल्गोरिथम
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.
उदाहरण कोड
#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; }
आउटपुट
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
3) असाइनमेंट "&=" ऑपरेटर द्वारा
यह वेक्टर 1 से वेक्टर 2 में मान कॉपी करने का एक सरल तरीका है
एल्गोरिथम
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.
उदाहरण कोड
#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; }
आउटपुट
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
4) push_back मेथड द्वारा
एल्गोरिथम
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.
उदाहरण कोड
#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; }
आउटपुट
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
5) वेक्टर को कंस्ट्रक्टर के रूप में पास करके
एल्गोरिथम
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.
उदाहरण कोड
#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; }
आउटपुट
v1 vector elements are : 7 6 4 5 v2 vector elements are : 7 6 4 5
