log10 (<valarray>)
Operates on the elements of an input valarray, returning a valarray whose elements are equal to the base 10 or common logarithm of the elements of the input valarray.
Syntax
template<class Type>
valarray<Type> log10(
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 common logarithm of the elements of the input valarray.
Example
// valarray_log10.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
#include <iomanip>
int main( )
{
using namespace std;
int i;
valarray<double> va1 ( 11 );
for ( i = 0 ; i < 11 ; i++ )
va1 [ i ] = 10 * i;
valarray<double> va2 ( 9 );
cout << "Initial valarray:";
for (i = 0 ; i < 11 ; i++ )
cout << " " << va1 [ i ];
cout << endl;
va2 = log10 ( va1 );
cout << "The common logarithm of the initial valarray is:\n";
for (i = 0 ; i < 11 ; i++ )
cout << va2 [ i ] << endl;
}
Initial valarray: 0 10 20 30 40 50 60 70 80 90 100 The common logarithm of the initial valarray is: -1.#INF 1 1.30103 1.47712 1.60206 1.69897 1.77815 1.8451 1.90309 1.95424 2
Requirements
Header: <valarray>
Namespace: std