/*文件名:exam7_20.cpp*/
#include <stdio.h>
#define N 10
float fun(int b[],int n);
main()
{
	int a[]={90,65,48,82,52,67,45,92,58,87};
	float avg;
	avg=fun(a,N);
	printf("avg=%g\n",avg);
}
float fun(int b[],int n)
{
	float s=0;
	int i;
	for (i=0;i<n;i++)
		s+=b[i];
	return s/N;
}