#include <stdio.h>
#define LINE 3 //正負循環長度
#define HEAD 100 //頭數
#define TAIL 5 //尾數
int main()
{
int Item_Number = 0; //項數
int Group_Number= 1; //組數
int i = 0,n = 0;
int Sam = 0;
int Bool = 1;
for(i = HEAD;i >= TAIL;i--)
{
Item_Number += 1;
if(n == LINE)
{
n = 0;
Bool *= -1;
Group_Number += 1;
}
n += 1;
printf("Number[%d] = %d\n",Item_Number,(i*Bool));// 輸出項數
Sam += i*Bool;
}
printf("Item Number = %d \n",Item_Number); //輸出項數
printf("Group NUmber = %d \n",Group_Number);//輸出組數
printf("Sam = %d\n",Sam);
return 0;
}