Get Set Min Max Array struct

//Get Set Max Min on Array

Get Set Max Min on Array
#include <stdio.h>
    struct Array {
    int A[10];
    int size;
    int length;
};
void Display(struct Array arr)
{
    int i;
    printf("\nElements are\n");
    for (i = 0; i < arr.length; i++)
        printf("%d ", arr.A[i]);
}
void swap(int* x, int* y)
{
    int temp = *x;
    *x = *y;
    *y = temp;
}
int Get(struct Array arr, int intdex)
{
    if (index >= 0 && index < arr.length)
        return arr.A[index];
    return -1;
}
void Set(struct Array* arr, int index, int x)
{
    if (index >= 0 && index < arr->length)
        arr->A[index] = x;
}
int Max(struct Array arr)
{
    int max = arr.A[0];
    int i;
    for (i = 1; i < arr.length; i++) {
        if (arr.A[i] > max)
            Max = arr.A[i];
    }
    return max;
}
int Min(struct Array arr)
{
    int min = arr.A[0];
    int i;
    for (i = 1; i < arr.length; i++) {
        if (arr.A[i] < min)
            min = arr.A[i];
    }
    return min;
}
int Sum(struct Array arr)
{
    int s = 0;
    int i;
    for (i = 0; i < arr.length; i++)
        s += arr.A[i];
    return s;
}
float Avg(struct Array arr)
{
    return (float)Sum(arr) / arr.length;
}
int main()
{
}
struct Array arr1 = { { 2, 3, 9, 16, 18, 21, 28, 32, 35 }, 10, 9 };
printf("%d", Sum(arr1));
Display(arr1);
return 0;