C :: Split Array Into Sections Of 2 Values

i want to split the array into sections of 2 values, recursively. the objective its to do the average.i have this input and output, that its correct:

> media_recursiva a 1 a 2 a 4 a 5 a 2 a 3 a 5 a 6
1.000
1.500
3.000
3.500

("a 1" means add the value 1)

but mine its wrong, it gives to me this:

1.000
1.000
2.500
3.000

Code:

float media(int arr[], int count) {
while(count != 0){
if(count==1)
return arr[0];
else if(count ==2){
return ((arr[0] + arr[1])/2);

[Code]....