transform.cpp

来自「C++高级编程这本书所附的源代码」· C++ 代码 · 共 43 行

#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
using namespace std;

// Function template to populate a container of ints.
// The container must support push_back().
template<typename Container>
void populateContainer(Container& cont)
{
  int num;

  while (true) {
    cout << "Enter a number (0 to quit): ";
    cin >> num;
    if (num == 0) {
      break;
    }
    cont.push_back(num);
  }
}

void print(int elem)
{
  cout << elem << " ";
}

int main(int argc, char** argv)
{
  vector<int> myVector;
  populateContainer(myVector);
  cout << "The vector contents are:\n";
  for_each(myVector.begin(), myVector.end(), &print);
  cout << endl;
  transform(myVector.begin(), myVector.end(), myVector.begin(),
	    bind2nd(plus<int>(), 100));
  cout << "The vector contents are:\n";
  for_each(myVector.begin(), myVector.end(), &print);
  cout << endl;
  return (0);
}