gslice::size
Finds the array values specifying the numbers of elements in a general slice of a valarray.
valarray<size_t> size( ) const;
Return Value
A valarray specifying the number of elements in each slice of a general slice of a valarray.
Remarks
The member function returns the stored lengths of slices.
Example
// gslice_size.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
int main( )
{
using namespace std;
int i;
size_t sizeVA;
valarray<int> va ( 20 ), vaResult;
for ( i = 0 ; i < 20 ; i+=1 )
va [ i ] = i;
cout << "The operand valarray va is:\n ( ";
for ( i = 0 ; i < 20 ; i++ )
cout << va [ i ] << " ";
cout << ")." << endl;
sizeVA = va.size ( );
cout << "The size of the valarray is: "
<< sizeVA << "." << endl << endl;
valarray<size_t> Len ( 2 ), Stride ( 2 );
Len [0] = 4;
Len [1] = 4;
Stride [0] = 7;
Stride [1] = 4;
gslice vaGSlice ( 0, Len, Stride );
vaResult = va [ vaGSlice ];
const valarray <size_t> sizeGS = vaGSlice.size ( );
cout << "The valarray for vaGSlice is vaResult:"
<< "\n va[vaGSlice] = ( ";
for ( i = 0 ; i < 8 ; i++ )
cout << vaResult [ i ] << " ";
cout << ")." << endl;
cout << "The size of vaResult is:"
<< "\n vaGSlice.size ( ) = ( ";
for ( i = 0 ; i < 2 ; i++ )
cout << sizeGS[ i ] << " ";
cout << ")." << endl;
}
The operand valarray va is: ( 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ). The size of the valarray is: 20. The valarray for vaGSlice is vaResult: va[vaGSlice] = ( 0 4 8 12 7 11 15 19 ). The size of vaResult is: vaGSlice.size ( ) = ( 4 4 ).
Requirements
Header: <valarray>
Namespace: std