解答:#include<stdio.h>void main()
{
double a,b,c,average;
printf("Enter a,b,c:\n");
scanf("%lf%lf%lf",&a,&b,&c);
average=(a+b+c)/3;
printf("(1)average=%lf\n",average);
average=average*10;
average=average+0.5;
average=(int)average;
average=average/10;
printf("(2)average=%lf\n",average);
}
