sarrayops1.hpp

C++ Templates 完全导引范例asics

/* The following code example is taken from the book
 * "C++ Templates - The Complete Guide"
 * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
 *
 * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
// addition of two SArrays
template<typename T>
SArray<T> operator+ (SArray<T> const& a, SArray<T> const& b)
{
    SArray<T> result(a.size());
    for (size_t k = 0; k<a.size(); ++k) {
        result[k] = a[k]+b[k];
    }
    return result;
}

// multiplication of two SArrays
template<typename T>
SArray<T> operator* (SArray<T> const& a, SArray<T> const& b)
{
    SArray<T> result(a.size());
    for (size_t k = 0; k<a.size(); ++k) {
        result[k] = a[k]*b[k];
    }
    return result;
}

// multiplication of scalar and SArray
template<typename T>
SArray<T> operator* (T const& s, SArray<T> const& a)
{
    SArray<T> result(a.size());
    for (size_t k = 0; k<a.size(); ++k) {
        result[k] = s*a[k];
    }
    return result;
}

// multiplication of SArray and scalar
// addition of scalar and SArray
// addition of SArray and scalar
//...