1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
/* File : example.h -- stolen from the guile std_vector example */
#include <vector>
#include <algorithm>
#include <functional>
#include <numeric>
double average(std::vector<int> v) {
return std::accumulate(v.begin(),v.end(),0.0)/v.size();
}
std::vector<double> half(const std::vector<double>& v) {
std::vector<double> w(v);
for (unsigned int i=0; i<w.size(); i++)
w[i] /= 2.0;
return w;
}
void halve_in_place(std::vector<double>& v) {
// would you believe this is the same as the above?
std::transform(v.begin(),v.end(),v.begin(),
std::bind2nd(std::divides<double>(),2.0));
}
|
