一个函数有关问题

#include <stdio.h>

float Max = 0, Min = 0;

void main()
{
    float arra(float ary[], float n);
    float srry[10], sum;
    int i;
    for (i = 0; i < 10; i++)
    {
        scanf("%f", &srry[i]);
    }
    sum = arra(srry,10);
    printf("Max = %f, Min = %f, Sum = %f", Max, Min, sum);
}
float arra(float array[], float n)
{
    int i;
    float aver,sum = array[0];
    /*为什么float aver,sum = array[0] 和Max = Min = array[0]顺序调换了就出错?*/
    Max = Min = array[0];

    for (i = 1; i < 10; i++)
    {
        if (array[i] > Max)
            Max = array[i];
        else if (array[i] < Min)
            Min = array[i];
        sum += array[i];
    }
    aver = sum / n;
    return aver;
}