binder4.cpp

来自「Think in C++ 第二版源码」· C++ 代码 · 共 32 行

//: C21:Binder4.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// The bound argument does not have 
// to be a compile-time constant
#include "copy_if.h"
#include "PrintSequence.h"
#include "../require.h"
#include <iostream>
#include <algorithm>
#include <functional>
#include <cstdlib>
using namespace std;

int boundedRand() { return rand() % 100; }

int main(int argc, char* argv[]) {
  requireArgs(argc, 1, "usage: Binder4 int");
  const int sz = 20;
  int a[20], b[20] = {0};
  generate(a, a + sz, boundedRand);
  int* end = copy_if(a, a + sz, b, 
    bind2nd(greater<int>(), atoi(argv[1])));
  // Sort for easier viewing:
  sort(a, a + sz);
  sort(b, end);
  print(a, a + sz, "array a", " ");
  print(b, end, "values greater than yours"," ");
} ///:~