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Copy a vector to another by using vector.assign() function in C++
C++ STL | Copy one vector to another by using vector.assign() function: Here, we are going to learn how to copy one vector to another by using vector.assign() function?
Submitted by IncludeHelp, on September 27, 2018
Given a vector and we have to assign copy it to another vector by using vector.assign() in C++.
Syntax of vector.assign() function:
v2.assign(v1.begin(), v1.end());
Program:
#include <iostream>
#include <vector>
using namespace std;
int main()
{
//declar and initialize vector 1
vector<int> v1{10,20,30,40,50};
//declare vector2
vector<int> v2(v1);
//assign all elements of v1 to v2
v2.assign(v1.begin(), v1.end());
//printing v1 and v2
cout<<"v1 elements: ";
for(int i=0; i<v1.size(); i++){
cout<<v1[i]<<" ";
}
cout<<endl;
cout<<"v2 elements: ";
for(int i=0; i<v2.size(); i++){
cout<<v2[i]<<" ";
}
cout<<endl;
return 0;
}
Output
v1 elements: 10 20 30 40 50
v2 elements: 10 20 30 40 50