valarray::operator-
A unary operator that applies a minus to each element in a valarray.
Syntax
valarray<Type> operator-( ) const;
Return Value
A valarray whose elements are minus those of the operand array.
Example
// valarray_op_eminus.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
int main( )
{
using namespace std;
int i;
valarray<int> vaL ( 10 );
valarray<int> vaMINUS ( 10 );
for ( i = 0 ; i < 10 ; i += 2 )
vaL [ i ] = -i;
for ( i = 1 ; i < 10 ; i += 2 )
vaL [ i ] = i-1;
cout << "The initial valarray is: ( ";
for ( i = 0 ; i < 10 ; i++ )
cout << vaL [ i ] << " ";
cout << ")." << endl;
vaMINUS = -vaL;
cout << "The element-by-element result of "
<< "the operator+ is the\n valarray: ( ";
for ( i = 0 ; i < 10 ; i++ )
cout << vaMINUS [ i ] << " ";
cout << ")." << endl;
}
The initial valarray is: ( 0 0 -2 2 -4 4 -6 6 -8 8 ). The element-by-element result of the operator+ is the valarray: ( 0 0 2 -2 4 -4 6 -6 8 -8 ).
Requirements
Header: <valarray>
Namespace: std