C++ Vector operator=() function

C++ Vector operator=() function tutorial for beginners and professionals with examples on assign(), at(), back(), begin(), capacity(), cbegin(), cend(), clear(), crbegin(), crend(), data(), emplace(), end(), front(), rbegin(), resize(), size(), swap() etc.

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C++ Vector operator=()

This function assigns new values to the vector container and replacing old ones.

Syntax

Consider two vectors 'v' and 'v1'. Syntax would be :

v.operator=(v1);

Here, the values of v1 vector are assigned to the vector v2.

Parameter

v1:v1 is a vector object.

Return value

It returns *this.

Example 1

Let's see a simple example.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
vector<char> v{'C','#'};
vector<char> v1;
v1.operator=(v);
for(int i=0;i<v.size();i++)
std::cout<< v[i];
return 0;
}

Output:

C#

In this example, values of v vector are assigned to the vector v1 using operator= () function.

Example 2

Let's see a another simple example.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
vector<string> v{"java"};
vector<string> v1{".NET"};
cout<<"initially,value of v1 is :";
for(int i=0;i<v1.size();i++)
std::cout<<v1[i];

cout<<'\n';
cout<<"Now, the value of vector v1 is :";
v1.operator=(v);
for(int i=0;i<v1.size();i++)
std::cout<<v1[i];
return 0;
}

Output:

java

In this example, values of v vector are assigned to the vector v1 using operator=() function and replacing the old contents.

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