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appending and subtracting a number in an array
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Join Date: Mar 2005
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how do u append and subtract a number in an array. i have no clue. any links to a site about this wouls greatly appreciated
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Join Date: Mar 2005
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Junior Poster in Training
oh this is for C++ too
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Join Date: Mar 2005
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eh that didnt help me much
>How do u append in an array.
If u want to add at end then simply do
If you want to add at the beginning or somewhere in middle then you need to shift the elements to make space for the new element.
>How do u subtract a number in an array.
I guess by this u mean removing an element...for this you need to shift elements again...which is very expensive.
If you have an array of 10 elements and you want to remove 5th element then u need to perform shifting of elements from 6th element so that, now element at 6th position becomes the element at 5th position, element at 5th position becomes the element at 4th position and so on...so that total elements are 1 less than before.
>eh that didnt help me much
That was basic array tutorial meant to make u aware of what arrays are...proper undrstanding of it will make u solve such problems...anyways here's another tutorial link
http://www.cplusplus.com/doc/tutorial/arrays.html
If u want to add at end then simply do
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>How do u subtract a number in an array.
I guess by this u mean removing an element...for this you need to shift elements again...which is very expensive.
If you have an array of 10 elements and you want to remove 5th element then u need to perform shifting of elements from 6th element so that, now element at 6th position becomes the element at 5th position, element at 5th position becomes the element at 4th position and so on...so that total elements are 1 less than before.
>eh that didnt help me much
That was basic array tutorial meant to make u aware of what arrays are...proper undrstanding of it will make u solve such problems...anyways here's another tutorial link
http://www.cplusplus.com/doc/tutorial/arrays.html
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Join Date: May 2004
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Try using the std::vector template class.
If you can only use pure arrays, then you will have to learn about dynamic memory allocation to modify the size of the array at run-time.
Or were you just asking if you want to put a new value into an array of a fixed size?
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If you can only use pure arrays, then you will have to learn about dynamic memory allocation to modify the size of the array at run-time.
Or were you just asking if you want to put a new value into an array of a fixed size?
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Originally Posted by FireNet
Or were you just asking if you want to put a new value into an array of a fixed size?
could i just use pointers to add it to the array?
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