C++ STL algorithm, fill_n() program sample
Compiler: Visual C++ Express Edition 2005
Compiled on Platform: Windows XP Pro SP2
Header file: Standard
Additional project setting: Set project to be compiled as C++
Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C++ Code (/TP)
Other info: none
To do: Using the C++ fill_n() to assign a new value to a specified number of elements in a range beginning with a particular element in C++ programming
To show: How to use the C++ algorithm, fill_n() to assign a new value to a specified number of elements in a range beginning with a particular element in C++ programming
// C++ STL algorithm, fill_n()
#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;
int main(void)
{
// vector container
vector <int> vec;
// vector iterator
vector <int>::iterator Iter1;
int i;
// pushing data, constructing vec vector
for(i = 10; i <= 20; i++)
vec.push_back(i);
// print the data
cout<<"vec vector data: ";
for(Iter1 = vec.begin(); Iter1 != vec.end(); Iter1++)
cout<<*Iter1<<" ";
cout<<endl;
// do the fill_n() operation, fill the last 3 positions for 6 position with a value of 9
cout<<"\nOperation: fill_n(vec.begin() + 3, 6, 9)\n";
fill_n(vec.begin() + 3, 6, 9);
// print the result
cout<<"Modified vec vector data: ";
for(Iter1 = vec.begin(); Iter1 != vec.end(); Iter1++)
cout<<*Iter1<<" ";
cout<<endl;
return 0;
}
Output examples:
vec vector data: 10 11 12 13 14 15 16 17 18 19 20
Operation: fill_n(vec.begin() + 3, 6, 9)
Modified vec vector data: 10 11 12 9 9 9 9 9 9 19 20
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