C++ iota()函数

iota函数对一个范围数据进行赋值：

template <class ForwardIterator, class T>
  void iota (ForwardIterator first, ForwardIterator last, T val)
{
  while (first!=last) {
    *first = val;
    ++first;
    ++val;
  }
}

用法：

// iota example
#include <iostream>     // std::cout
#include <numeric>      // std::iota

int main () {
  int numbers[10];

  std::iota (numbers,numbers+10,100);

  std::cout << "numbers:";
  for (int& i:numbers) std::cout << ' ' << i;
  std::cout << '\n';

  return 0;
}

output：

numbers: 100 101 102 103 104 105 106 107 108 109