memfun3.cpp

来自「很经典的书籍」· C++ 代码 · 共 30 行

//: C06:MemFun3.cpp
// Using mem_fun()
#include <algorithm>
#include <functional>
#include <iostream>
#include <iterator>
#include <string>
#include <vector>
#include "NumStringGen.h"
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;
  const char* vcp[sz];
  transform(vs.begin(), vs.end(), vcp,
    mem_fun_ref(&string::c_str));
  vector<double> vd;
  transform(vcp, vcp + sz, back_inserter(vd),
    std::atof);
  copy(vd.begin(), vd.end(),
    ostream_iterator<double>(cout, "\t"));
  cout << endl;
} ///:~