printsequence.h

来自「Think in C++ 第二版源码」· C头文件 代码 · 共 35 行

//: C21:PrintSequence.h
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Prints the contents of any sequence
#ifndef PRINTSEQUENCE_H
#define PRINTSEQUENCE_H
#include <iostream>

template<typename InputIter>
void print(InputIter first, InputIter last,
  char* nm = "", char* sep = "\n", 
  std::ostream& os = std::cout) { 
  if(*nm != '\0') // Only if you provide a string
    os << nm << ": " << sep; // is this printed
  while(first != last)
    os << *first++ << sep;
  os << std::endl;
}

// Use template-templates to allow type deduction
// of the typename T:
template<typename T, template<typename> class C>
void print(C<T>& c, char* nm = "", 
  char* sep = "\n", 
  std::ostream& os = std::cout) {
  if(*nm != '\0') // Only if you provide a string
    os << nm << ": " << sep; // is this printed
  std::copy(c.begin(), c.end(), 
    std::ostream_iterator<T>(os, " "));
  cout << endl;
}
#endif // PRINTSEQUENCE_H ///:~