abs (<valarray>)
Operates on the elements of an input valarray, returning a valarray whose elements are equal to the absolute value of the elements of the input valarray.
template<class Type>
valarray<Type> abs(
const valarray<Type>& _Left
);
Parameters
- _Left
The input valarray whose elements are to be operated on by the member function.
Return Value
A valarray whose elements are equal to the absolute value of the elements of the input valarray.
Example
// valarray_abs.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
int main( )
{
using namespace std;
int i;
valarray<int> va1 ( 9 ), va2 ( 9 );
for ( i = 0 ; i < 4 ; i++ )
va1 [ i ] = -i;
for ( i = 4 ; i < 9 ; i++ )
va1 [ i ] = i;
cout << "The initial valarray is: ";
for (i = 0 ; i < 9 ; i++ )
cout << va1 [ i ] << " ";
cout << "." << endl;
va2 = abs ( va1 );
cout << "The absolute value of the initial valarray is: ";
for (i = 0 ; i < 9 ; i++ )
cout << va2 [ i ] << " ";
cout << "." << endl;
}
The initial valarray is: 0 -1 -2 -3 4 5 6 7 8 . The absolute value of the initial valarray is: 0 1 2 3 4 5 6 7 8 .
Requirements
Header: <valarray>
Namespace: std