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C++ Vector Library - operator=() Function
Description
The C++ function std::vector::operator=() assign new contents to the vector by replacing old ones and modifies size if necessary.
Declaration
Following is the declaration for std::vector::operator=() function form std::vector header.
C++98
vector& operator = (const vector& x);
C++11
vector& operator = (const vector& x);
Parameters
x − another vector object of same type
Return value
Returns this pointer
Exceptions
This member function never throws exception.
Time complexity
Linear i.e. O(n)
Example
The following example shows the usage of std::vector::operator=() function.
#include <iostream> #include <vector> using namespace std; int main(void) { vector<int> v1 = {1, 2, 3, 4, 5}; vector<int> v2; /* assignment operator */ v2 = v1; for (int i = 0; i < v2.size(); ++i) cout << v2[i] << endl; return 0; }
Let us compile and run the above program, this will produce the following result −
1 2 3 4 5
vector.htm
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