>>194 シンプル >
#include <stdio.h>

#define COUNT 5
double date[5]={10.8,20.3,30.6,40.4,50.5};

void main(void)
{
  int i;
  double *p=date, sum=0.0, ave;

  printf(" 配列の内容\n date[]=");
  for(i=0; i<COUNT; i++, p++) {
    sum += *p;
    printf("%f", *p);
    if(i < COUNT-1) printf(",");
  }
  ave = sum / COUNT;
  printf("\n 合計=%f\n 平均=%f\n", sum, ave);
}