use std::fill to populate vector with increasing numbers

by

Preferably use std::iota like this:

std::vector<int> v(100) ; // vector with 100 ints.
std::iota (std::begin(v), std::end(v), 0); // Fill with 0, 1, ..., 99.

That said, if you don’t have any c++11 support (still a real problem where I work), use std::generate like this:

struct IncGenerator {
    int current_;
    IncGenerator (int start) : current_(start) {}
    int operator() () { return current_++; }
};

// ...

std::vector<int> v(100) ; // vector with 100 ints.
IncGenerator g (0);
std::generate( v.begin(), v.end(), g); // Fill with the result of calling g() repeatedly.

More Related Contents:

  1. C++ sorting and keeping track of indexes
  2. Remove spaces from std::string in C++
  3. Why should one not derive from c++ std string class?
  4. problem sorting using member function as comparator
  5. Why can’t simple initialize (with braces) 2D std::array? [duplicate]
  6. Is it safe to assume that STL vector storage is always contiguous?
  7. Why can’t we declare a std::vector?
  8. Efficient way of reading a file into an std::vector?
  9. Determine if a type is an STL container at compile time
  10. Removing item from vector while iterating?
  11. string c_str() vs. data()
  12. C++ valarray vs. vector
  13. What is the difference between const_iterator and non-const iterator in the C++ STL?
  14. Is it reasonable to use std::basic_string as a contiguous buffer when targeting C++03?
  15. What is the preferred/idiomatic way to insert into a map?
  16. vector or map, which one to use?
  17. I want to convert std::string into a const wchar_t *
  18. STL vector and thread-safety
  19. Adding types to the std namespace
  20. what is the best modern c++ approach to construct and manipulate a 2d array [closed]
  21. What the point of using std::ios_base::binary?
  22. How to check that an element is in a std::set?
  23. Determine if map contains a value for a key?
  24. Windows Unicode C++ Stream Output Failure
  25. STL remove doesn’t work as expected?
  26. Converting between C++ std::vector and C array without copying
  27. C++, can I statically initialize a std::map at compile time?
  28. error for hash function of pair of ints
  29. STL algorithms: Why no additional interface for containers (additional to iterator pairs)?
  30. Why does (i|o)fstream take a const char* parameter for a file name?

Leave a Comment