slice.cpp

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#include <iostream>    // for cout, endl
#include <valarray.h>  // Includes valarray and provides stream inserter.
#include <examples.h>  // Generic header for all examples.
 
 
int main ()
{
    typedef std::valarray<int> Valarray;
 
    // create a non-const valarray of integers
    const Valarray::value_type ia [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
 
    Valarray vi (ia, sizeof ia / sizeof *ia);
 
    // print out its contents
    std::cout << "original valarray vi: "
              << vi << "\n\n";
 
    // print out a slice of the valarrayt object
    std::cout << "vi [slice (1, 3, 3)]: "
              << vi [std::slice (1, 3, 3)] << '\n';
 
    // create a const valarray object
    const Valarray vj (ia, sizeof ia / sizeof *ia);
 
    // print out a slice (uses a different operator)
    std::cout << "vi [slice (0, 5, 2)]: "
              << vj [std::slice (0, 5, 2)] << '\n';
 
    return 0;
}