gslice::start

Sucht den Startindex eines allgemeinen Slices eines Wertarrays.

size_t start( ) const;

Rückgabewert

Der Startindex eines allgemeinen Slices eines Wertarrays.

Beispiel

// gslice_start.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>

int main( )
{
   using namespace std;
   int i;

   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;

   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 ];
   size_t vaGSstart = vaGSlice.start ( );

   cout << "The valarray for vaGSlice is vaResult:"
        << "\n va[vaGSlice] = ( ";
      for (i = 0 ; i < 8 ; i++ )
         cout << vaResult [ i ] << " ";
   cout << ")." << endl;

   cout << "The index of the first element of vaResult is: "
        << vaGSstart << "." << endl;
}

Anforderungen

Header: <valarray>

Namespace: std

Siehe auch

Referenz

gslice Class