?? memfun4.cpp
字號:
//: C21:MemFun4.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Using the SGI STL compose1 function
#include "NumStringGen.h"
#include <algorithm>
#include <vector>
#include <string>
#include <iostream>
#include <functional>
using namespace std;
int main() {
const int sz = 9;
vector<string> vs(sz);
// Fill it with random number strings:
generate(vs.begin(), vs.end(), NumStringGen());
copy(vs.begin(), vs.end(),
ostream_iterator<string>(cout, "\t"));
cout << endl;
vector<double> vd;
transform(vs.begin(), vs.end(), back_inserter(vd),
compose1(ptr_fun(atof),
mem_fun_ref(&string::c_str)));
copy(vd.begin(), vd.end(),
ostream_iterator<double>(cout, "\t"));
cout << endl;
} ///:~
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