How can I add int to my int array. I do not want to set array size, I do not want to use external loop.
int myArray[] = {};
...
if (condition)
{
myArray.push(value);
}
2 Answers
As Leon suggests what you're looking for is vector and specifically its push_back method.
You could use it as follows:
vector<int> myArray; // currently size 0
if(condition) {
myArray.push_back(value); // now resized to 1;
}
EDIT:
You can use an ostream_iterator to print a vector. For example:
copy(cbegin(myArray), cend(myArray), ostream_iterator<int>(cout, " "))
21 Comments
StoryTeller - Unslander Monica
@JonathanMee A range based for loop automates the iterator protocol just as well. I don't buy that using an algorithm is more readable in this case. (Although I agree that one should prefer re-use of algorithms, this is going a bit too far IMHO)
Jonathan Mee
@StoryTeller I can agree with that, though my personal preference is the
copy statement, particularly to the multi-lined for-statement, or even worse the single line for-statement.StoryTeller - Unslander Monica
@JonathanMee, well, can't argue with preferences :)
Jonathan Mee
@TeodorKolev That's because
resultArray is empty.StoryTeller - Unslander Monica
@TeodorKolev, are you sure? Print the vectors
size() first. |
You cannot use push into an array. I would suggest you to use lists or vectors if you don't want to set any size.
2 Comments
StoryTeller - Unslander Monica
list have sub-performance most of the time, except in a truly parallel setting. It's better to turn to
std::vector by default.
UnholySheep
Also you should prefer linking to cppreference.com over cplusplus.com (the latter one is occasionally inaccurate)
std::vectorif you need a dynamic array.