#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
void Show(double);
int main()
{
double arr1[5] = {2, 4, 8, 10, 16};
double arr2[5] = {1, 3, 5, 7, 9};
cout.setf(ios_base::fixed);
cout.precision(1);
cout << "arr1:\t";
for_each(arr1+1,arr1+5, Show); // (1)
cout << endl;
cout << "arr2: \t";
for_each(arr2+1,arr2+5, Show); // (2)
cout << endl;
vector<double> sum(5); // (3)
transform(arr1, arr1 + 5, arr2, sum.begin(),plus<double>()); // (4)
cout << "sum:\t";
for_each(sum.begin(),sum.end(), Show); // (5)
cout << endl;
vector<double> prod(5); // (6)
transform(arr1, arr1 + 5, prod.begin(),
bind1st(multiplies<double>(), 2.5)); // (7)
cout << "prod:\t";
for_each(prod.begin(),prod.end(), Show); // (8)
cout << endl;
return 0;
}
void Show(double v)
{
cout.width(6);
cout << v << ' ';
}
運行結果: