20140318_KUAS_VisualC++_CalculationOfResults

/*************************************/
/** 20140318 Calculation of Results **/
/** Maker  : Yan                    **/
/** E-Mail : [email protected]  **/
/** Date   : 2014/03/11 pm.11:56    **/
/*************************************/

#include <stdio.h>
#include <stdlib.h>

void main()
{
        /*定義變數, 當select 輸入為1 時代表及格, 2 則為不及格
          pass 為及格人數,total 為成績總數                   */
        int select = 0, pass = 0, total = 0;
        float pass_percentage = 0;

        printf("Enter score, -1 is exit program.\n");

        //當輸入不等於-1 時執行迴圈
        while(1)
        {
            printf("Enter Number: ");
            scanf("%d", &select);
            if(select != -1)
            {
                total += 1;
                if(select == 1)
                {
                    pass += 1;
                }
            }
            else if(select == -1)
            {
                break;
            }
        }

        //已跳出迴圈, 開始計算及格百分率
        //當成績總數等於零, 代表無資料可計算
        if(total == 0)
        {
            printf("No data can calculate");
        }
        else
        {
            //輸出及格人數
            printf("Pass: %d\n", pass);
            //輸出不及格人數(總人數 減去 及格人數)
            printf("Fail: %d\n", total - pass);

            //及格百分率, 利用float(浮點數) 進行運算
            pass_percentage = ((float)pass / total) * 100;
            printf("Pass percentage: %2.2f%%.\n", pass_percentage);
        }
    system("pause");
}