Removing ‘#include ‘ doesn’t break the code

by

The reason it works is because has been included by a header that you have also included.

For example vector might have included algorithms in it’s source. This is common as they are often header only.

That said, you can not rely on the specific implementation of the standard library to have the same includes in each header. (for example with might work with MSVC and it might break with gcc stdlibc+++).

For this reasons I highly recommend including what you use, regardless of where it will compile of not. — note that this is slightly different to ‘what you reference’ because forward declaration for point and references in headers can significantly improve build time.

More Related Contents:

  1. Insertion sort stops working after million input
  2. How to find out how many bits are set (equal 1) in the product of two integers [closed]
  3. C++ – Find numbers between first and last negative numbers in Array
  4. Program stopped working, when tried to run
  5. Absolute Distinct Numbers
  6. C++ throwing exception in recursive algorithm
  7. How to use Quick Sort to sort an array of strings
  8. How to get the maximum number after erasing n digits from the number [closed]
  9. Image Processing: Algorithm Improvement for ‘Coca-Cola Can’ Recognition
  10. Rotating a point about another point (2D)
  11. Create Random Number Sequence with No Repeats
  12. Fast ceiling of an integer division in C / C++
  13. Getting the actual length of a UTF-8 encoded std::string?
  14. Algorithm for finding the smallest power of two that’s greater or equal to a given value [duplicate]
  15. Search for a struct item in a vector by member data
  16. How can I find the actual path found by BFS?
  17. How can I sort a std::map first by value, then by key?
  18. what is the difference between set and unordered_set in C++?
  19. Most efficient/elegant way to clip a number?
  20. Similar String algorithm
  21. The intersection of two sorted arrays
  22. Calculating the Amount of Combinations
  23. sine wave that slowly ramps up frequency from f1 to f2 for a given time
  24. Better shading on BW display while rendering filled surfaces
  25. Why would anyone use set instead of unordered_set?
  26. What’s time complexity of this algorithm for finding all combinations?
  27. Counting number of bits: How does this line work ? n=n&(n-1); [duplicate]
  28. Good C++ solutions to the “Bring all the zeros to the back of the array” interview challenge
  29. Finding square root without using sqrt function?
  30. Order Statistic Tree in C++

Leave a Comment