vector::assign
Erases a vector and copies the specified elements to the empty vector.
void assign(
size_type _Count,
const Type& _Val
);
template<class InputIterator>
void assign(
InputIterator _First,
InputIterator _Last
);
Parameters
_First
Position of the first element in the range of elements to be copied._Last
Position of the first element beyond the range of elements to be copied._Count
The number of copies of an element being inserted into the vector._Val
The value of the element being inserted into the vector.
Remarks
After erasing any existing elements in a vector, assign either inserts a specified range of elements from the original vector into a vector or inserts copies of a new element of a specified value into a vector.
Example
// vector_assign.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>
int main( )
{
using namespace std;
vector<int> v1, v2, v3;
vector<int>::iterator iter;
v1.push_back(10);
v1.push_back(20);
v1.push_back(30);
v1.push_back(40);
v1.push_back(50);
cout << "v1 = " ;
for (iter = v1.begin(); iter != v1.end(); iter++)
cout << *iter << " ";
cout << endl;
v2.assign(v1.begin(), v1.end());
cout << "v2 = ";
for (iter = v2.begin(); iter != v2.end(); iter++)
cout << *iter << " ";
cout << endl;
v3.assign(7, 4) ;
cout << "v3 = ";
for (iter = v3.begin(); iter != v3.end(); iter++)
cout << *iter << " ";
cout << endl;
}
Output
v1 = 10 20 30 40 50
v2 = 10 20 30 40 50
v3 = 4 4 4 4 4 4 4
Requirements
Header: <vector>
Namespace: std