shift positions inside of an array?

shift positions inside of an array? - Printable Version

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+--- Thread: shift positions inside of an array? (/showthread.php?tid=659026)

shift positions inside of an array? - wallee - 20.09.2018

let's say i have an array of 5 integers like this:

pos 0: 100
pos 1: 200
pos 2: 300
pos 3: 400
pos 4: 500

now i need to insert another integer with value 50 at "pos 0" but i want all of the values to remain except the last one, so the array will look like this:

pos 0: 50
pos 1: 100
pos 2: 200
pos 3: 300
pos 4: 400

so basically everything should shift the position by 1 to make space for the new value

is there some technique to do this fast and easy?!

Re: shift positions inside of an array? - NaS - 20.09.2018

A simple loop.

Код:

for(new i = sizeof(array) - 1; i > 0; i --)
{
array[i] = array[i - 1];
}

array[0] = new_value;

Assuming an array size of 5, it first moves index 3 to 4, then 2 to 3, then 1 to 2 and last 0 to 1.
After that overwrite index 0 with the new value.

Re: shift positions inside of an array? - wallee - 20.09.2018

thank you NaS