C :: How To Delete Number And Find Closest

Write a function which takes string of integer numbers and length of a string. Function need to return value of element which is close to mean of all numbers and transform string without that element. If are more numbers in same "distance" of mean, function need to find first and throw that number-element.

In function without []..
with pointers.

I wrote this code below, programm find mean of elements and if mean is equal to any element of string.. the programm return that number. Idk how to delete that number and how to find closest.. for ex:

String=[4,7,10,3]
sum=24
mean=6

The progoramm need to delete 7 and new string look like String=[4,10,3]

insert Code:
#include <stdio.h>
int main()
{
int n,i;
printf("Elements of string ?

[Code]....