slice a valarray : slice « STL Algorithms Helper « C++ Tutorial

1. C++ Tutorial
2. STL Algorithms Helper
3. slice

#include <iostream>
#include <valarray>
#include <cmath>
using namespace std;

int main()
{
  valarray<int> v(10);

  for(int i=0; i<10; i++)
      v[i] = i;

  cout << "Original contents: ";
  for(int i=0; i<10; i++)
    cout << v[i] << " \n\n";

  valarray<int> result = v[slice(0,5,2)];

  cout << "Contents of result: ";
  for(int i=0; i<result.size(); i++)
    cout << result[i] << " ";


  cout << endl;
}

Original contents: 0

1

2

3

4

5

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7

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9

Contents of result: 0 2 4 6 8