#include <stdio.h>
#include<stdlib.h>
int main()
{  

    double a = 0.0;
    double b = 0.0;
    while (true)
    {
        printf("请输入数据：");
        scanf("%f",&b);
        _sleep(100);
        a = a + b;
        printf("******************结果：%f\n\a",a);
   
    }
   
    system("pause");   

    return 0;   

       }