slice::size
Finds the number of elements in a slice of a valarray.
size_t size( ) const;
Return Value
The number of elements in a slice of a valarray.
Example
// slice_size.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
int main( )
{
using namespace std;
int i;
size_t sizeVA, sizeVAR;
valarray<int> va ( 20 ), vaResult;
for ( i = 0 ; i < 20 ; i += 1 )
va [ i ] = i+1;
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;
slice vaSlice ( 3 , 6 , 3 );
vaResult = va [ vaSlice ];
cout << "The slice of valarray va is vaResult = "
<< "va[slice( 3, 6, 3)] =\n ( ";
for ( i = 0 ; i < 6 ; i++ )
cout << vaResult [ i ] << " ";
cout << ")." << endl;
sizeVAR = vaSlice.size ( );
cout << "The size of slice vaSlice is: "
<< sizeVAR << "." << endl;
}
The operand valarray va is: ( 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ). The size of the valarray is: 20. The slice of valarray va is vaResult = va[slice( 3, 6, 3)] = ( 4 7 10 13 16 19 ). The size of slice vaSlice is: 6.
Requirements
Header: <valarray>
Namespace: std