exp (<valarray>)
Operates on the elements of an input valarray, returning a valarray whose elements are equal to the natural exponential of the elements of the input valarray.
template<class Type>
valarray<Type> exp(
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 natural exponential of the elements of the input valarray.
Example
// valarray_exp.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
#include <iomanip>
int main( )
{
using namespace std;
int i;
valarray<double> va1 ( 9 );
for ( i = 0 ; i < 9 ; i++ )
va1 [ i ] = 10 * ( 0.25 * i - 1 );
valarray<double> va2 ( 9 );
cout << "Initial valarray:";
for ( i = 0 ; i < 9 ; i++ )
cout << " " << va1 [ i ];
cout << endl;
va2 = exp ( va1 );
cout << "The natural exponential of the initial valarray is:\n";
for ( i = 0 ; i < 9 ; i++ )
cout << va2 [ i ] << endl;
}
Initial valarray: -10 -7.5 -5 -2.5 0 2.5 5 7.5 10
The natural exponential of the initial valarray is:
4.53999e-005
0.000553084
0.00673795
0.082085
1
12.1825
148.413
1808.04
22026.5
Requirements
Header: <valarray>
Namespace: std