?? ptrfun2.cpp
字號:
//: C21:PtrFun2.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Using ptr_fun() for two-argument functions
#include <algorithm>
#include <vector>
#include <iostream>
#include <functional>
#include <cmath>
using namespace std;
double d[] = { 01.23, 91.370, 56.661,
023.230, 19.959, 1.0, 3.14159 };
const int dsz = sizeof d / sizeof *d;
int main() {
vector<double> vd;
transform(d, d + dsz, back_inserter(vd),
bind2nd(ptr_fun(pow), 2.0));
copy(vd.begin(), vd.end(),
ostream_iterator<double>(cout, " "));
cout << endl;
} ///:~
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