例8.12
float average(float array[ ]
,int n)
 {int i;
float aver,sum=array[0];
for(i=1;i<n;i++)
sum=sum+array[i];
aver=sum/n;
return(aver);

main()
{float score-1[5]={98.5,97,91.5,60,55};
float score-2[10]={67.5,89.5,99,69.5,77,89.5,76.5,54,60,99.5};
printf("the average of class A is %6.2f\n",average(score-1,5));
printf("the average of class B is %6.2f\n",average(score-2,10));

运行结果如下:
the average of class A is 80.40
the average of class B is 78.20